By Xu Wang, IIASA Young Scientists Summer Program (YSSP) alumnus and Assistant Professor at Beijing University of Technology and Pallav Purohit, researcher in the IIASA Air Quality and Greenhouse Gases Program.
Xu Wang and Pallav Purohit write about their recent study in which they found that accelerating the transition to climate-friendly and energy-efficient air conditioning in the Chinese residential building sector could expedite building a low-carbon society in China.
China saw the fastest growth worldwide in energy demand for space cooling in buildings over the last two decades, increasing at 13% per year since 2000 and reaching nearly 400 terawatt-hours (TWh) of electricity consumption in 2017. This growth was largely driven by increasing income and growing demand for thermal comfort. As a result, space cooling accounted for more than 10% of total electricity growth in China since 2010 and around 16% of peak electricity load in 2017. That share can reach as much as 50% of peak electricity demand on extremely hot days, as seen in recent summers. Cooling-related carbon dioxide (CO2) emissions from electricity consumption consequently increased fivefold between 2000 and 2017, given the strong reliance on coal-fired power generation in China .
In our recent publication in the journal Environmental Science and Technology, we used a bottom-up modeling approach to predict the penetration rate of room air conditioners in the residential building sector of China at the provincial level, taking urban-rural heterogeneity into account. Our results reveal that increasing income, growing demand for thermal comfort, and warmer climatic conditions, could drive an increase in the stock of room air conditioners in China from 568 million units in 2015 to 997 million units in 2030, and 1.1 billion units in 2050. In urban China, room air conditioner ownership per 100 households is expected to increase from 114 units in 2015 to 219 units in 2030, and 225 units in 2050, with slow growth after 2040 due to the saturation of room air conditioners in the country’s urban households. Ownership of room air conditioners per 100 households in rural China could increase from 48 units in 2015 to 147 units in 2030 and 208 units in 2050 .
The Kigali Amendment to the Montreal Protocol on Substances that Deplete the Ozone Layer will help protect the climate by phasing down high global warming potential (GWP) hydrofluorocarbons (HFCs), which are commonly used as refrigerants in cooling technologies . Promoting energy efficiency of cooling technologies together with HFC phase-down under the amendment can significantly increase those climate co-benefits. It is in this context that we assessed the co-benefits associated with enhanced energy efficiency improvement of room air conditioners (e.g., using efficient compressors, heat exchangers, valves, etc.) and the adoption of low-GWP refrigerants in air conditioning systems. The annual electricity saving from switching to more efficient room air conditioners using low-GWP refrigerants is estimated at almost 1000 TWh in 2050 when taking account of the full technical energy efficiency potential. This is equivalent to approximately 4% of the expected total energy consumption in the Chinese building sector in 2050, or the avoidance of 284 new coal-fired power plants of 500 MW each.
Our results indicate that the cumulative greenhouse gas mitigation associated with both the electricity savings and the substitution of high-GWP refrigerants makes up 2.6% of total business-as-usual CO2 equivalent emissions in China over the period 2020 to 2050. Therefore, the transition towards the uptake of low-GWP refrigerants is as vital as the energy efficiency improvement of new room air conditioners, which can help and accelerate the ultimate objective of building a low-carbon society in China. The findings further show that reduced electricity consumption could mean lower air pollution emissions in the power sector, estimated at about 8.8% for sulfur dioxide (SO2), 9.4% for nitrogen oxides (NOx), and 9% for fine particulate matter (PM2.5) emissions by 2050 compared with a pre-Kigali baseline.
China can deliver significant energy savings and associated reductions in greenhouse gas and air pollution emissions in the building sector by developing and implementing a comprehensive national policy framework, including legislation and regulation, information programs, and incentives for industry. Energy efficiency and refrigerant standards for room air conditioning systems should be an integral part of such a framework. Training and awareness raising can also ensure proper installation, operation, and maintenance of air conditioning equipment and systems, and mandatory good practice with leakage control of the refrigerant during the use and end-of-life recovery. Improved data collection, research, and cooperation with manufacturers can equally help to identify emerging trends, technology needs, and energy efficiency opportunities that enable sustainable cooling.
 IEA (2019). The Future of Cooling in China: Delivering on Action Plans for Sustainable Air Conditioning, International Energy agency (IEA), Paris.
 Wang X, Purohit P, Höglund Isaksson L, Zhang S, Fang H (2020). Co-benefits of energy-efficient air conditioners in the residential building sector of China, Environmental Science & Technology, 54 (20): 13217–13227 [pure.iiasa.ac.at/16823]
 Purohit P, Höglund-Isaksson L, Dulac J, Shah N, Wei M, Rafaj P, Schöpp W (2020). Electricity savings and greenhouse gas emission reductions from global phase-down of hydrofluorocarbons, Atmospheric Chemistry and Physics, 20 (19): 11305-11327 [pure.iiasa.ac.at/16768]
Note: This article gives the views of the author, and not the position of the Nexus blog, nor of the International Institute for Applied Systems Analysis (IIASA).
By Rachel Potter, Communications Officer in the IIASA Communications and External Relations Department.
Several members of the IIASA Strategic Taskforce share their views on the bold new IIASA strategic agenda, how it came to be, and what it promises for the future.
What will the world look like in 2030 and beyond? We are living in extraordinary times and our rapidly transforming planet faces multiple global sustainability challenges, threats, and opportunities. How will research institutes like IIASA continue to make meaningful contributions to address these complex issues?
This is precisely what IIASA has been exploring over the past 18 months while formulating its strategic direction for the next 10 years. Through institute-wide consultations, a strategic taskforce was entrusted with coordinating the process that led to “Reducing footprints, enhancing resilience” – the institute’s ambitious new strategy for 2021-2030 that positions IIASA as the primary destination for integrated systems solutions and policy insights.
A bottom-up inclusive approach
The strategy consultation process was very different to those previously undertaken at IIASA. Acting Transitions to New Technologies Program Director and Energy Program researcher, Shonali Pachauri describes the rationale behind the process:
“While in the past strategic planning had largely been driven by the directorate and program directors, this time, mid-career scientists were to drive the process forward. It was not meant to be one researcher from each program on the taskforce, but it ended up being something like that, so we had a broad representation of disciplines from across the institute. The taskforce was responsible for developing the scientific content of the plan and we did this in an inclusive manner with input from staff through workshops, an online platform, and both informal and formal meetings.”
Reflecting our changing world
The UN Sustainable Development Goals (SDGs) established in 2015, are clearly reflected in the new strategy. Linda See, a researcher in the Ecosystems Services and Management Program, explains:
“We have always worked on sustainable development and transformations but this is now more of a focus compared to the previous strategy. The emphasis is on using our expertise as systems scientists to explore the interrelationships between different SDGs and how there can be synergies and trade-offs in different scenarios to achieve them.”
“Another key shift is that the new strategic plan takes a human-centered approach, placing more emphasis on how people are a core component of pathways towards sustainability and resilient societies,” adds World Population Program Deputy Program Director, Raya Muttarak.
Fellow taskforce member and Acting Water Program Director, Yoshihide Wada, agrees:
“This focus on social science, governance, and human behavior came out of our consultations with staff. IIASA researchers really want to go in this direction. People increasingly understand that with the climate and environmental goals in particular, it can’t only be technology and bioeconomy, it has to be about lifestyles as well, which means we need to strengthen our ability to analyze behavior and identify which levers to pull to encourage lifestyle changes.”
“There is also a stronger focus on biodiversity. The importance of this was borne out of the current COVID-19 crisis. Looking at the origin of the virus and how the pandemic has been aided by the loss of biodiversity – it’s evident that this is crucial,” adds Manager of Library and Knowledge Resources, Michaela Rossini.
Building on strong foundations for continued innovation
Taskforce members agree that the new strategy consolidates the unique strengths of IIASA while providing the space and flexibility for innovation.
“IIASA is unique not only because of our excellence in the fields of energy, environment, climate change, and ecosystems services but also because we have strong, empirically-based analyses and studies from social sciences, which can quantify and forecast relevant demographic, social, and economic dimensions in systems analysis,” says Muttarak.
“I think the new strategy pushes the interdisciplinarity at IIASA even further. The new program structure is very integrated. This is vital to facing today’s sustainability challenges. There are big aspirations in the strategy and it’s our responsibility to translate this into practice. As scientists, we have to be open to change and include elements that we may never have thought of. It makes things very interesting. It makes innovation happen,” Wada adds.
Pachauri explains that IIASA was created as a science-to-policy interface in 1972 and its purpose has always been to bridge divides: both between disciplines and across transnational boundaries. The new strategy really builds on this history. While the institute innovates a lot in terms of models and methods, this always happens through an applied lens of doing something that will ultimately feed into policy.
One of the institute’s key strengths is its relationships with its National Member Organizations and strong global network. These relationships are what make it possible to tackle the real-world problems society faces today. The flexibility to work across networks, countries, and different levels of government is strongly emphasized in the strategy.
A bit like family
According to Muttarak, the process of drawing up the new IIASA strategy has been a great opportunity to work with people from different programs and units. Not only has this allowed everyone involved to get to know their colleagues better, but it has also enhanced team members’ understanding of systems analysis and the importance of IIASA.
“It was challenging and rewarding, a bit like family!” comments Pachauri. “There was a lovely dynamism in the team and although we had a Chair, everyone had a chance to lead at various times in the process.”
“As the only non-scientist I found working on the taskforce invaluable – understanding more about IIASA research and getting to know scientists from across the institute has really enhanced my awareness of what they do and what their needs are going forward,” Rossini concludes.
The full IIASA Strategic Taskforce is comprised of: Luis Gomez Echeverri, Matthias Jonas, Mauricio A. Lopes, Junko Mochizuki, Raya Muttarak, Shonali Pachauri, Michaela Rossini, Linda See, Thomas Schinko, Yoshihide Wada, and Fabian Wagner.
Note: This article gives the views of the author, and not the position of the Nexus blog, nor of the International Institute for Applied Systems Analysis.
By Nebojsa Nakicenovic, Director of The World In 2050 and Emeritus Research Scholar at IIASA
IIASA Emeritus Scholar Nebojsa Nakicenovic explains how the societal disruptions caused by the coronavirus pandemic can offer an opportunity for a more sustainable and innovative future.
While the future of humanity has always been unpredictable, major challenges — like the current pandemic — have been an inevitable part of our shared history. What is different now, however, is that human beings have become the dominant force of planetary change. In other words, the Anthropocene has arrived, and with it an unprecedented opportunity to steer our collective future.
Science, technology, and innovation (STI) are the drivers of this change, and can also be the means of achieving a sustainable, equitable, and resilient future for both human civilization and the biosphere. These tools, however, need to be complemented with the necessary evolutions of our economies, public institutions, and behavioral norms. The rapid rise in inequality and resource consumption over the last few decades, for example, has led to increasing pressure on people and the planet in ways that are clearly unsustainable. It is within this context that the COVID-19 pandemic could become a disruptive event that triggers fundamental change toward a more desirable future for all.
Human history is rich with other instances of rapid social and environmental evolution, from the agricultural turn of the Neolithic Revolution some ten thousand years ago to the explosive changes brought about by the Industrial Revolution two centuries ago. However, it was the ‘great acceleration’ of the last 50 years, characterized by exponential growth of consumption and rapid degradation of planetary support systems, that brought us to the geophysical limits of our home world for the first time. These rapid developments were neither smooth nor pervasive, and were interlaced with many crises, wars and pandemics, natural disasters, and numerous other disruptive events. Yet over the last 200 years we’ve seen a 7x increase in the global population, a 100x increase in economic output, and a 20x increase in carbon dioxide emissions.
Photo by Holger Link on Unsplash
In the aftermath of major crises that caused deep disruption, loss of life, and the destruction of capital and jobs, a ‘new normal’ eventually emerged — the major depressions of the 1870s and 1930s, as well as the oil crisis of the 1970s, are just three examples among many. Events like these arguably amplified the limits and disadvantages of the ‘old’ and paved the way for the ‘new’, with each crisis catalyzing innovation and the re-direction of human activities towards a fundamentally new direction. Today, we might say that each caused a tipping point that led to new development and behavioral pathways.
The COVID-19 pandemic, one of the greatest threats to human societies in recent memory, can be seen as a similarly catalytic event. While history does not repeat itself, there are many similarities in the response strategies to earlier pandemics such as the Black Plague of the middle ages and the Spanish Flu of the 1920s, including policies of ‘social distancing’ and isolation and barriers of entry to those from ‘outside’. Even the word quarantine (meaning ‘forty days’ in Venetian) was first coined during the plague epidemic of the 14th century.
Photo by Cheng Feng on Unsplash
Today’s crisis, as in the past, has revealed the worst parts of our nature, as with the callous exclusion of the needy, homeless, and migrants from the emerging responses, as well as the hoarding of perceived scarce goods by the well-off. At the same time, the pandemic has brought out some of the best human characteristics: self-sacrifice in helping others, renewed empathy and solidarity, and unprecedented global cooperation within science and between governments as we work to stem the worst of the pandemic.
Moreover, there is mounting evidence that the partial shut-down of the global economy has had demonstrably positive effects on the environment, such as reduced emission levels, lower pollution, and a resurgence in wildlife. While an economic depression is by no means a viable mitigation strategy for climate change and other pressing environmental issues, these data make clear that the right policies and priority investments in STI could have immediate and significant effects in our efforts to transition to a sustainable world.
Many scientists, policymakers, and other stakeholders are already working to leverage this current moment of opportunity into lasting change. The World in 2050, a global research agenda aiming to help reach the United Nations’ Sustainable Development Goals, offers six transformations that outline essential STI, institutional, and behavioral synergies to achieve the new direction for human development while providing critical support for the most vulnerable among us. The Earth Commission, a group of leading scientists convened by Future Earth, is working to underpin the development of science-based targets for systems like land, water, and biodiversity in order to guide companies and cities towards sustainable pathways, as many thought leaders are beginning to reconsider the stability and efficiency of our current economic systems. Thomas Piketty, for example, has recently proposed that every person should receive $120,000 at age of 25 to enable innovative initiatives among those who lack the capital to do so. Bold efforts like these will become increasingly necessary as we work towards a new set of planetary operating parameters that will ensure an equitable and sustainable future for all.
Our response to COVID-19 could help redirect trillions of dollars towards this agenda. While current measures aim to preserve existing institutional and economic arrangements, we should press decision makers to actively channel these funds into the drivers of innovation to bring about the future we want to live in. This deep and ongoing crisis may destroy some of the ‘old’ characteristics of this moment in human history, and could bring about the transformations in sustainability that will enable us to build a better future for all life here on Earth. The risk is that exactly the opposite will happen — and that is a risk that humanity cannot afford to take.
By Raquel Guimaraes, postdoc in the IIASA World Population Program, and Debbora Leip, an alumnus of the IIASA Advanced Systems Analysis Program
IIASA researcher Raquel Guimaraes and former research assistant Debbora Leip encourage the support of the Cercedilla Manifesto, arguing that it is high time for the scientific community to take responsibility and set an example by making research meetings more sustainable.
The research community widely agrees that strong action is needed to counteract the climate crisis that is currently taking place. Nevertheless, scientists regularly meet at conferences that are often far from sustainable. Problems range from participants flying to attend events, to unnecessary gadgets and gifts handed out at the meetings, and unsustainable catering at conference dinners. In light of the current public debate on environmental and social sustainability, we call on scientists to take a leading role in changing their work practices towards more sustainable habits, starting with research meetings.
In April 2020, Alberto Sanz-Cobena and several colleagues published an article titled Research meetings must be more sustainable in Nature Foods. They presented the Cercedilla Manifesto with 12 sustainability decisions as guidelines for organizers and attendees of research meetings (see Figure 1). The starting point of the manifesto is to question whether a physical meeting is indeed necessary. If organizers decide that it is, there is still the question of whether each single attendee really needs to physically join the conference. Often, remote participation can be equally efficient if a technical solution is provided by the organizers. Furthermore, if a decision to conduct a physical meeting is taken, organizers have to consider what food will be served.
The authors state that excessive amounts of food and food waste are very common at meetings, which makes a change of mindset towards better food management very important, not only for climate change, but for many other environmental threats. In our opinion, this point has so far been neglected in public debate.
Given the urgency for climate change action and the need for individuals to play an active role – with research scientists taking the lead – we assert that it is urgent to start changing our habits and setting an example regarding environmental and social sustainability in research meetings. Indeed, many of us take it for granted that to meet and discuss our work, we must travel. Most attendees do not even question that unnecessary gadgets and gifts are distributed or that opulent dinners are provided.
We hope that the Cercedilla Manifesto will raise awareness about the fact that good scientific output often does not require a physical meeting by providing a conceptual framework for change in this regard. If we support the manifesto, we stand a chance to lower the barrier to dare deviating from currently applied practices. The 12-sustainability decisions were designed by specialists to serve as a reference for anybody who wishes to organize/attend a sustainable meeting.
In the current situation brought about by the global COVID-19 crisis, almost everybody has experienced that remote conferences are not only possible, but also efficient – sometimes even more so than a physical meeting would have been. First, it saves time in terms of travel. Second, it may be more inclusive by allowing people to attend, who would not have had the opportunity to join otherwise, be it for financial, family, or other reasons. In addition, remote meetings provide additional features, like a chat function that could add another discussion layer.
Of course, remote meetings also have their limitations: informal in-person meetings during coffee breaks, for example, can enhance networking and free discussions, and sometimes contribute significantly to a meeting’s outcome. Virtual meetings also face several other challenges, such as participation by attendees from different time zones, or poor internet connections. These issues could however easily be addressed by spreading the meeting over more days, in such a way that the need for attendance outside of acceptable time slots is minimized, and by investing saved traveling costs into better equipment.
Let us learn from this experience and not go ‘back to normal’ after the COVID-19 crisis. We should take this as an opportunity to speed up change and tackle the other global crisis of climate change!
Sanz-Cobena A, Alessandrini R, Bodirsky BL, Springmann M, Aguilera E, Amon B, Bartolini F, Geupel M, et al. (2020). Research meetings must be more sustainable. Nature Food1, 187–189. DOI: 10.1038/s43016-020-0065-2
To reduce water pollution and climate risks, the world needs to go beyond signing agreements and start acting. Translating agreements and policies into action is however always much more difficult than it might seem, because it requires all players involved to participate. A complete integration strategy across all sectors is needed. One of the advantages of integrating all sectors is that it would be possible to meet different objectives, for example, climate and water protection goals in this case, with the same strategy.
I was involved in a study that assessed the impacts of implementing various technologies to treat wastewater from the fish processing industry in Indonesia when involving different levels of governance. This study is part of the strategies that the government of Indonesia is evaluating to meet the greenhouse gas mitigation goals pledged in its Nationally Determined Contribution (NDC), as well as to reduce water pollution. Although Indonesia has severe national wastewater regulations, especially in the fish processing industry, these are not being strictly implemented due to lack of expertise, wastewater infrastructure, budgetary availability, and lack of stakeholder engagement. The objective of the study was to evaluate which technology would be the most appropriate and what levels of governance would need to be involved to simultaneously meet national climate and water quality targets in the country.
Seven different wastewater treatment technologies and governance levels were included in the analysis. The combinations included were: 1) Untreated/anaerobic lagoons – where untreated means wastewater is discharged without any treatment and anaerobic lagoons are ponds filled with wastewater that undergo anaerobic processes – combined with the current level of governance. 2) Aeration lagoons – which are wastewater treatment systems consisting of a pond with artificial aeration to promote the oxidation of wastewaters, plus activated sludge focused solely on water quality targets with no coordination between water and climate institutions. 3) Swimbed, which is an aerobic aeration tank focusing mainly on climate targets assuming no coordination between institutions. 4) Upflow anaerobic sludge blanket (UASB) technology, which is an anaerobic reactor with gas recovery and use followed by Swimbed, and 5) UASB with gas recovery and use followed by activated sludge, which is an aerobic treatment that uses microorganisms forming particles that clump together. Both, 4 and 5 assume vertical and horizontal coordination between water and climate institutions at national, regional, and local level. It is important to notice that the main difference between 4 and 5 is the technology used in the second step. Two additional combinations, 6 and 7, are also proposed including the same technological combinations of 4 and 5, but these include increasing the level of governance to a multi-actor coordination level. The multi-actor level includes coordination at all institutional levels but also involves academia, research institutes, international support, and other stakeholders.
Our results indicate that if the current situation continues, there would be an increase of greenhouse gases and water pollution between 2015 and 2030, driven by the growth in fish industry production volumes. Interestingly, the study also shows that focusing only on strengthening capacities to enforce national water policies would result in greenhouse gas emissions five times higher in 2030 than if the current situation continues, due to the increased electricity consumption and sludge production from the wastewater treatment process. The benefit of this strategy would be positive for the reduction of water pollution, but negative for climate change mitigation. From our analyses of combinations 2 and 3 we learned that technology can be very efficient for one purpose but detrimental for others. If different institutions are, for example, responsible for water quality and climate change mitigation, communication between the institutions is crucial to avoid trade-offs between environmental objectives.
Furthermore, when analyzing different cooperation strategies together with a combination of diverse sets of technologies, we found that not all combinations work appropriately. For instance, improving interaction just within and between institutions does not guarantee proper selection and application of technologies. In this case, the adoption of the technology is not fast enough to meet the targets proposed in 2030, thus resulting in policy implementation failures. Our analyses of combinations 4 and 5 showed that interaction within and between national, regional, and local institutions alone is not enough to prevent policy failure.
Finally, a multi-actor cooperation strategy that includes cooperation across sectors, administrative levels, international support, and stakeholders, seems to be the right approach to ensure selection of the most appropriate technologies and achieve policy success. We identified that with this approach, it would be possible to reduce water pollution and simultaneously decrease greenhouse gas emissions from the electricity required for wastewater treatment. Analyzing combinations 6 and 7 revealed that multi-actor governance allows to simultaneously meet climate and water objectives and a high chance to prevent policy failure.
In the end, analyses such as the one shown here, highlight the importance of integrating and creating synergies across sectors, administrative levels, stakeholders, and international institutions to ensure an effective implementation of policies that provide incentives to make careful choices regarding multi-objective treatment technologies.
Gómez-Sanabria A, Zusman E, Höglund-Isaksson L, Klimont Z, Lee S-Y, Akahoshi K, Farzaneh H, & Chairunnisa (2019). Sustainable wastewater management in Indonesia’s fish processing industry: bringing governance into scenario analysis. Journal of Environmental Management (Submitted).
Note: This article gives the views of the author, and not the position of the Nexus blog, nor of the International Institute for Applied Systems Analysis.