White reflects the sun just like the color black absorbs it. Black will become hot, while white will keep cool. This is why painting your roof white may help reduce your energy usage in hot areas. It can keep your home cooler so you don’t need to use as much air conditioning, which is a large source of energy usage in the US. Greece is a great example of this idea put into action as nearly every home and building on the Greek Isles are painted white with bright blue trim. They do this to prevent overheating in the hot Mediterranean environment.
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