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What's the basic idea?
What's the basic idea?
Painting surfaces white will benefit the climate in two ways:
Painting surfaces white will benefit the climate in two ways:
cooler climate: Less heat trapped on the earth's surface
cooler climate: Less heat trapped on the earth's surface
Albedo rises, which means that the sun's rays are reflected more efficiently into space, meaning less of the sun's heat remains trapped on the Earth's surface.
less emissions: lower need for AC in hot climates
less emissions: lower need for AC in hot climates
For buildings, the roofs not only reflect these rays into space, but the white paint reflecting these rays also means they are not absorbed. This means the building's roof and ultimately the building itself, cools down. According to the following paper, "It was found that painting the roof surface with white solar-reflective paint is a very efficient way to reduce heat discomfort conditions for a single-story building located in cities with hot/humid and hot/dry climates." (page 11, 4. Conclusions, § 1, line 2 of source)
For a better understanding, click here.
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