Preventing climate change and building resilience in cities require real energy revolutions, shifting towards greater efficiency, and renewable energy use. Cities are leading actors in the transition from fossil fuels to alternative energy sources, as well as "negative-cost" strategies like building retrofits and smart metering.

Leading the cleantech revolution
Cities have much to gain from the cleantech revolution: climate protection, improved air quality, energy security, and sustainable economic development through the establishment of cleantech centres. Local policies include setting targets for renewables or for CO2 reduction, urban planning, building regulations, tax relief, financial assistance, and municipal purchases and investments. Some cities have been trailblazers, for instance in mandating solar water heaters in new buildings, in providing subsidies for installations of solar panels and in financing construction of wind farms and smart grids.



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