Search Climate Insights Directory

The report outlines the challenges of implementing nature-based solutions (NbS) in Indian cities, where rapid urban expansion has increased heat and flood risks. Based on a multi-stakeholder workshop, it identifies systemic barriers across design, finance, governance, operations, and policy. The central conclusion is that NbS efforts in India are currently fragmented and limited to isolated pilots due to the lack of a national or state-level policy framework. The document argues that establishing such a framework is a foundational imperative to provide the legal and operational scaffolding necessary to scale integrated blue-green-gray infrastructure.

The briefing outlines five key heat metrics—land surface temperature, air temperature, heat index, wet bulb globe temperature, and thermal comfort indices—detailing their specific uses and limitations. It argues that while traditional metrics are useful for regional analysis and safety limits, thermal comfort modeling is essential for understanding human-scale heat exposure and designing local interventions like shade and wind corridors. The document provides a framework for matching these metrics to goals such as protecting pedestrians, reducing energy use, or lowering citywide temperatures.

A World Weather Attribution analysis finds that human-induced climate change made the extreme heat in South Sudan in February 2025 at least 2C hotter and at least 10 times more likely. The report highlights that women and girls bear disproportionate impacts due to their roles in agriculture and unpaid care work, as well as systemic inequalities in education and health. The study notes that extreme heat exacerbates malnutrition for 860,000 children under five and increases risks for 1.1 million people in overcrowded shelters due to conflict.

The Sustana Cooling India Fund is a USD 100 million blended capital equity fund designed to support early-growth companies in India's cooling sector. By utilizing a first-loss cushion and combining senior and subordinated equity, the fund aims to de-risk investments in energy-efficient space cooling and cold supply chains. The instrument targets the 'missing middle' of funding (pre-Series A/B stages) to drive both climate mitigation and adaptation, with a projected return of 18.04% in USD terms for limited partners.

The analysis examines how the expansion of built-up areas at the expense of natural heat sinks like green spaces and water bodies increases urban heat risks in major cities across the Critical 9 countries. Using Copernicus Land Monitoring Service data and the IPCC's SSP1-1.9 scenario, the report details specific land-use losses in cities such as Shanghai, Karachi, and Dhaka, linking these changes to increased vulnerability to dangerous heat days (above 35°C) and rising energy demands for active cooling.

The report evaluates sustainable cooling policy progress in the 'Critical 9' countries, finding that while energy efficiency policies exist, they are inconsistently implemented and often fail to cover off-grid devices or reflect best-in-class technology. It highlights a significant gap in integrating cooling demand into national electrification planning and financial incentives, while noting varying levels of adoption of National Cooling Action Plans (NCAPs) and the Kigali Amendment.

The report highlights the critical link between sustainable cooling and the achievement of SDG3 (good health and well-being), emphasizing that vaccine efficacy and patient care depend on reliable cold chains and temperature-controlled environments. It identifies significant gaps in cold chain equipment and electricity access in low- and middle-income countries, particularly in Sub-Saharan Africa and Gavi-eligible nations. The document advocates for a combination of passive design, nature-based solutions, and energy-efficient appliances, such as super-efficient refrigerators and solar direct drive technology, to ensure health service resilience in a warming world.

The report highlights the escalating risks of extreme heat on human health and productivity, noting that 356,000 people died from extreme heat in 2019. It argues that while cooling demand is expected to soar—with space-cooling units potentially reaching 2.5 billion by 2030—this must be managed through sustainable solutions to avoid tripling global electricity demand by 2050. The text advocates for a mix of passive cooling, nature-based solutions, and energy-efficient active cooling, supported by policies like Minimum Energy Performance Standards (MEPS) and the appointment of Chief Heat Officers in cities such as Athens and Miami Dade County.

Chilling Prospects 2022 identifies that 3.66 billion people face high or medium risk from cooling access challenges, with 1.2 billion rural and urban poor at high risk. The report highlights critical gaps in food cold chains, health services, and human safety, while forecasting that achieving SDG 7.1 and SDG 1.1 could reduce the high-risk population by 36% by 2030. It advocates for a transition to sustainable, energy-efficient cooling and the implementation of National Cooling Action Plans (NCAPs) to mitigate climate impacts and protect vulnerable populations.

The Beehive is a modular, electricity-free cooling façade developed by Ant Studio in Delhi, India. It utilizes a terracotta beehive structure and recycled water to achieve evaporative cooling and natural ventilation. In a test at the Deki Electronics factory, the system reduced indoor temperatures from 42°C to 36°C and lowered airflow from 10 m/s to 4 m/s, offering a cost-effective and energy-efficient alternative to traditional air conditioning.

The document details the application of reflective cool roofs in Bangladesh and Indonesia, demonstrating significant reductions in indoor and surface temperatures for low-income housing and industrial facilities.

The report evaluates fans, refrigerators, air coolers, and air conditioners for off-grid use, linking their power requirements to the World Bank's Multi-Tier Framework (MTF). It finds that efficiency gains allow cooling services to be accessible at lower energy tiers than previously thought. The document proposes a quality criteria framework (Rating A-D) to help investors and development programmes identify 'best available technologies' and recommends the use of results-based financing (RBF) and third-party testing to scale the market for sustainable, climate-friendly cooling.

The report addresses the lack of granular, standardized data on cooling finance, which currently relies on equipment sales estimates or fragmented sectoral data. To resolve this, the authors propose a 'Cooling Investment Tracking Framework' using a six-letter code-tagging system. This system evaluates four dimensions: cooling orientation (the extent to which cooling is the project's purpose), climate orientation (whether the solution is efficient, clean, or sustainable), solution type (categorized into technology, services, policy, and finance), and purpose (mapped to OECD DAC codes). The framework aims to help stakeholders quantify financial commitments, monitor the phase-out of high-GWP refrigerants, and inform national cooling action plans. The authors recommend piloting the framework with development finance institutions to create a universal standard for tracking sustainable cooling investments.

The report argues that current cooling finance datasets are fragmented and lack the granularity needed to evaluate investment patterns against global needs. To resolve this, it introduces a code-tagging system that categorizes transactions across four dimensions: cooling orientation, climate orientation, solution type, and purpose. The framework aims to move beyond simple equipment sales data to include passive cooling, policy, and service-based investments, ultimately informing targeted investment strategies to meet Sustainable Development Goals and Paris Agreement targets.

The report identifies that 1.12 billion people across 76 countries are at high risk due to a lack of access to cooling, with the COVID-19 pandemic increasing this number by approximately 50 million in 2021. It highlights critical gaps in rural and urban poor populations, particularly in Africa and Asia, and examines the urgent need for sustainable cold chains for vaccine distribution. The document also promotes National Cooling Action Plans (NCAPs) and showcases passive and solar-powered cooling solutions in countries like Colombia, Rwanda, Bangladesh, and Indonesia.

The guide outlines three primary passive strategies for maintaining cool indoor temperatures: preventing heat gain through shading and reflective materials, utilizing natural ventilation like 'night flushes', and improving interior comfort with air movement and thermal mass. For active cooling, it recommends high-efficiency options such as ductless heat pumps and heat recovery ventilators (HRVs). The document illustrates these principles through two case studies in Colorado, demonstrating how super insulation, solar PV, and passive design can maintain comfortable indoor temperatures without traditional air conditioning during extreme heat.

The document identifies significant barriers to financing sustainable cooling, including the diversity of needs across human comfort, agriculture, and health sectors, and a lack of global tracking for cooling-specific investments. It argues that while private capital is abundant, it is often too risk-averse for the innovative or low-income contexts where cooling is most needed. The brief highlights the role of the Kigali Cooling Efficiency Program (K-CEP) and suggests leveraging blended finance, national cooling action plans, and bulk procurement to scale solutions. It specifically emphasizes the need to coordinate funding for refrigerant replacement (via the Montreal Protocol) with energy efficiency improvements to maximize climate benefits.

The report outlines a comprehensive framework for sustainable cooling, categorizing solutions into four pillars: technology, services, policy, and finance. It emphasizes that achieving 'cooling for all' requires an optimized approach to meet fundamental needs in comfort and safety, food and nutrition, and health and care, particularly for vulnerable populations. The document introduces a five-part solution approach—Protect, Reduce, Shift, Improve, and Leverage—to guide the selection of measures ranging from nature-based passive cooling to high-efficiency active technologies and regulatory policies.

The report identifies that 1.02 billion people among the rural and urban poor across 54 high-impact countries remain at high risk due to a lack of access to cooling in 2020. It highlights a 'productivity penalty' where heat stress is estimated to cause an annual economic loss of USD 630 billion across these countries, with significant impacts on the agricultural sector. The document also examines how the COVID-19 pandemic exacerbated these vulnerabilities, particularly regarding the medical cold chain for vaccines and food security. To address these challenges, it proposes a sustainable cooling framework based on three needs (comfort & safety, food & nutrition, health & care), five solution approaches (protect, reduce, shift, improve, leverage), and four solution pillars (technology, services, policy, financial).

The report highlights the critical need for sustainable cooling to address health, food security, and economic risks affecting billions of people. It identifies a cooling gap impacting approximately 1.1 billion people in extreme heat, while noting that 2.3 billion low-to-middle-income individuals risk driving climate disasters by adopting low-efficiency cooling products. The document advocates for a coordinated approach integrating the Sustainable Development Goals, the Paris Agreement, and the Kigali Amendment to promote high-efficiency technologies, passive cooling, and innovative business models.