By Sharon Atieno
As temperatures continue to rise and cooling demand soars, adopting sustainable cooling could reduce greenhouse gas emissions while saving trillions of dollars.
This is according to a new United Nations Environment Programme (UNEP) report, Global Cooling Watch 2025, launched at the 30th UN Conference on Climate Change Conference of the Parties (COP30) in Belém, Brazil.
According to the report, adopting a ‘Sustainable Cooling Pathway’, could reduce emissions to 64 per cent – 2.6 billion tons of carbon dioxide emissions – below the levels expected in 2050. When combined with rapid decarbonization of the global power sector, residual cooling emissions could fall to 97 per cent below business-as-usual levels.
This Pathway involves a strong focus on passive techniques low-energy and hybrid cooling that combines fans and air conditioners that consume little or no power.
The report notes that with cooling demand set to triple by 2050, this would almost double cooling-related greenhouse gas emissions over 2022 levels – pushing cooling emissions to an estimated 7.2 billion tons of carbon dioxide emissions by 2050. This is despite efforts to improve energy efficiency, phase down climate-warming refrigerants and overwhelm power grids during peak load.
“As deadly heat waves become more regular and extreme, access to cooling must be treated as essential infrastructure alongside water, energy and sanitation,” said Inger Andersen, Executive Director of UNEP.
“But we cannot air condition our way out of the heat crisis, which would drive greenhouse gas emissions higher and raise costs. Passive, energy-efficient and nature-based solutions can help meet our growing cooling needs and keep people, food chains and economies safe from heat as we pursue global climate goals. We have no excuse: it is time we beat the heat”.
Published by the UNEP-led Cool Coalition, the report is the most comprehensive assessment to date of the rapidly growing global demand for cooling and the need for climate-friendly solutions to the issue.
A Sustainable Cooling Pathway can provide access to space cooling or refrigeration, resilient buildings and urban green spaces to all – including low-income and vulnerable groups – such as smallholder farmers, women and the elderly – without exacerbating the climate crisis.
This Pathway combines passive cooling strategies, low-energy and hybrid cooling that combines fans and air conditioners, rapid adoption of high-efficiency equipment and accelerated phase-down of hydrofluorocarbon (HFC) refrigerants under the Kigali Amendment.
Nearly two-thirds of the emissions cuts available come from passive and low-energy solutions, reinforcing the urgency of embedding them in national policies and urban planning. Such solutions are also highly affordable and critical for improving access to cooling for three billion more people by 2050. If adopted, the Pathway could save US$17 trillion in cumulative energy costs through to 2050 and avoid up to US$26 trillion in grid investment through reduced electricity demand.
Beat the Heat
These measures underpin the Mutirão Contra o Calor Extremo / Beat the Heat implementation drive – a collective effort of led by the Brazil COP30 presidency and UNEP Cool Coalition – to localize the Global Cooling Pledge and bridge gaps in policy, finance and delivery of heat resilience and urban cooling. Today, over 185 cities from Rio de Janeiro to Jakarta to Nairobi and 83 partners have joined Beat the Heat -alongside the 72 Global Cooling Pledge signatories.
“Beat the Heat is one of those initiatives that shows that mutirão works, meaning that people have to come together and work on what they understand. And that’s what Beat the Heat is all about. It raised an issue in an appealing way that will bring people together to make the effort we need to combat climate change,” said Ambassador André Corrêa do Lago, COP30 President-Designate.
“For Somalian cities like Dolow, Biadoa, Galkaio and Bossaso, sustainable cooling is not a luxury—it is a lifeline. By joining Beat the Heat and working with the UNEP-led Cool Coalition, we aim to protect lives and livelihoods from intensifying heat while advancing climate commitments. Together with other cities, we can turn passive cooling and innovation into resilience for the most vulnerable urban communities,” said Lt. Gen. Bashir Mohamed Jama – Minister of Environment and Climate Change, Somalia.
Progress being made, but uneven
Some 72 nations have joined the Global Cooling Pledge to reduce cooling-related emissions by 68 per cent by 2050 following this Sustainable Cooling Pathway. As of mid-2025, 29 countries had established specific greenhouse gas reduction targets for the cooling sector, with a further five developing such targets.
In total, 134 countries have incorporated cooling into their Nationally Determined Contributions (NDCs), National Adaptation Plans (NAPs), Long-term Low Emission Development Strategies (LT-LEDS), energy plans, or other national climate strategies.
However, only 54 countries have comprehensive policies across all three priority areas for cooling: passive cooling in building energy codes, minimum energy performance standards, and refrigerant transition. A further 78 countries cover two of these pillars, 40 cover only one, and 20 have yet to begin.
The largest gaps are in African and Asia-Pacific countries, where much of the global rise in demand for cooling can be expected.
The report issues a series of recommendations to increase action, including moving from emergency response mode to proactive, multi-level governance on extreme heat and cooling, treating heat protection and cooling as a public good, and prioritizing passive and Nature-based Solutions– including urban design – to cut cooling loads, mitigate the urban heat island effect and reduce grid stress.
