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Whitening the world's roofs would offset the emissions of the world's cars for 20 years, according to a new study from Lawrence Berkeley National Laboratory.
Overall, installing lighter-colored roofs and pavement can cancel the heat effect of two years of global carbon dioxide emissions, Berkeley Lab says. It's the first roof-cooling study to use a global model to examine the issue.
The study used a global land surface model from NASA's Goddard Space Flight Center, which contained regional information on surface variables like topography, evaporation, radiation and temperature, as well as on cloud cover, Berkeley Lab says.
Whitening Cities' Roofs Is Environmental Equivalent of Taking 300 Million Cars Off the Road, DoE Study Says | Popular Science