Buildings account for 40% of global energy demand and a third of all greenhouse gas emissions. Ways to decrease the carbon footprint include numerous technologies. Electric heat pumps are starting to make headway in Japan, Europe and the UK. Researchers and companies are also developing better cooling technologies, smart windows that save energy use, better paints and coatings, and bio-based insulating materials. Swapping conventional insulation with such insulation materials like straw or hemp, and firing up wood pellets or a heat pump for warmth could slash building emissions by almost 90%.
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