Fighting Climate Change with White Paint
Painting roofs white could have a major impact on global carbon emissions, according to three scientists. But what may seem like a wacky idea has years of data to back it up.
"An Iranian-born nuclear engineer who, for the last three decades, has worked as a scientist at the Lawrence Berkeley National Laboratory, Hashem Akbari would like to see $3 billion of the economic stimulus package directed toward painting white or a light color as many of the nation's roofs, and as much of its pavement, as possible — all with the goal of directing more solar radiation into space.
Akbari, along with Surabi Menon, another LBNL scientist, and Arthur Rosenfeld, a former LBNL scientist and now a California Energy Commission board member, claim that painting urban surfaces in warm parts of the world white or a light color could offset the carbon emissions of all 600 million of the world's cars for 18 to 20 years — at a savings equivalent to at least $1 trillion worth of CO2 reductions.
This is not a hoax: Akbari, Menon and Rosenfeld are three of the country's leading experts in their field, and their study published in the journal Climatic Change is backed by years of carefully calculated data."
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Yes it works¡
• Yes it works¡. Actually it has been working in mediterranean countries for ages.
We have recently published our research with evidences of a decrease in local temperatures by whitening extense surfaces, such as greenhouse farming development.
Here is the news at
http://www.newscientist.com/article/mg20026775.000-are-shiny-hothouses-k...
And at Reuters: How to solve greenhouse effect? Build greehouses
http://www.reuters.com/article/lifestyleMolt/idUSTRE4983OH20081009
The full scientific paper and a summary in english can be found in our web
http://www.ual.es/~pcampra
Painting roofs white
In tropical climates, at least in India, this method of reducing heat absorption and its transmission within the dwellings has been practiced for centuries . I have a personal experience of painting the roof of my apartment on the top floor with white paint which reduced the temperature below by almost 5 degrees celsius
in the rural areas green creepers (vegetation )is used that covers the entire roof of a thatched hut keeping the inside cool in hot summers.