Dubai – The Global Cooling Watch Report 2023, released on December 5, 2023, by the United Nations Environment Programme (UNEP), emphasizes the need for passive cooling methods as an alternative to traditional air conditioning systems. The report predicts a significant increase in the global capacity of cooling equipment by 2050, leading to a substantial rise in electricity consumption and emissions from refrigerant gases.
According to World Economic Forum, nearly 1,000 cities could experience average summer temperatures of 35°C, a significant increase from current numbers. The urban population exposed to these high temperatures is projected to reach 1.6 billion, marking an 800% increase from current levels. In response, UNEP launched the Nature for Cool Cities Challenge, promoting efficient and eco-friendly cooling methods.
The report showcases five global examples of passive cooling strategies:
In Koudougou, Burkina Faso, Schorge Secondary School incorporates traditional building methods using locally sourced laterite bricks and a secondary façade of eucalyptus wood. This design effectively manages heat during the day and night, creating a cooler environment for students.
Ahmedabad, India, responded to a severe heatwave by implementing a white roof initiative for 7,000 low-income households. This measure, along with increased tree planting and public water access, is estimated to save around 1,100 lives annually. Ahmedabad’s strategy has inspired similar plans in 30 other Indian cities.
The Maldives Meteorological Services building in Addu City showcases passive cooling techniques, emphasizing shading, insulation, and orientation to reduce temperatures without increasing electricity consumption. This initiative is part of the Maldives’ efforts to adapt to climate challenges with the support of UNEP.
Cambodia is experiencing a rising demand for building cooling. UNEP and UN ESCAP are collaborating with property developers to test passive cooling strategies, such as insulation and roof design. The goal is to integrate these methods into national building standards and urban planning to reduce energy demand and provide heat relief.
Seoul, Republic of Korea, revitalized the 11km Cheonggyecheon Stream, leading to significantly cooler temperatures in the surrounding areas. This natural solution effectively mitigates the urban heat-island effect, showcasing the impact of ecological restoration in urban settings.
The 28th session of the United Nations Climate Change Conference (COP28) in Dubai, UAE, from November 30 to December 12, 2023, focuses on reducing emissions and halting global warming. COP28 will review the Global Stocktake’s findings on progress toward the Paris Agreement’s goal of limiting global temperature rise to below 1.5°C.