Study: Insulation and thermostat tweaks improve quality of life more than EVs across 18 countries

A new study from the International Institute for Applied Systems Analysis examined six climate actions across 18 countries and found that demand-side measures like insulation and thermostat adjustments boost quality of life more than supply-side options such as electric vehicles or heat pumps. The research modeled a 10% emissions reduction for each strategy and rated them on household finances, health, energy security, and fairness. All pathways improved quality of life, but efficiency upgrades and behavior changes scored slightly higher, with consistent benefits in both high- and low-income countries. The findings challenge the idea that climate action is a burden. Survey respondents in the Netherlands, Brazil, and China viewed both demand- and supply-side approaches as acceptable and likely to improve daily life. Pairing clean technology with efficiency gains, like sealing drafts before installing a heat pump, can lower bills and increase comfort without requiring major lifestyle changes. This suggests policymakers should design climate strategies around what people value most: lower costs, better health, and a fair transition.