White roofs can help in the fight against climate change? Depends On.
The white-painted roofs can help in the fight against climate change? And the green roofs? A paper published in the Proceedings of the National Academy of Sciences addressed these two themes and the answer, oddly enough, is the same: it depends on the region where they are located.The study was developed in the United States and explained, for example, that this type of roofs do not produce many effects in the North of the country â€" but work in the South. On the other hand, and when it comes specifically to roofs painted white, they get better results in Florida in the Southeast, in California, in the Pacific.According to Kill Georgescu, scientist of sustainability at Arizona State University and lead author of the study, the roofs are important primarily in urban areas, heated by the asphalt.An example are the green roofs New Yorkers, one of the major trends of the city's sustainability and that helped reduce the use of air conditioning.The work used climate models to examine six megacities. "Our study shows that geography matters," said Georgescu. In the case of northern cities, energy saving by using less electricity in the summer is aborted by the requirement of heating in winter."The evaluation of consequences that extend beyond the surface temperatures approaching, as precipitation and energy demands, reveals important factors that sometimes are not taken into account," concluded the researchers, according to the Nature World News.Foto:  Walmart Corporate / Creative Commons
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