Steven Chu, le secrétaire à l'énergie d'Obama, à affirmé ceci:
By lightening paved surfaces and roofs to the colour of cement, it would be possible to cut carbon emissions by as much as taking all the world’s cars off the roads for 11 yearsSource avec vidéo
Est-ce que ce plan fait du sens? Plusieurs se le demande, dont Rush Limbaugh:
“Now, would somebody explain to me how he knows this? … If we can do something that will effectively remove the carbon emissions of every car on the road for 11 years, then why are we doing anything else? Why are we doing cap and trade? Why are we getting rid of SUVs? … How much paint is this going to take, by the way? How much of a footprint does paint manufacturing leave? … I need a scientist to answer this for me. I understand how clouds at altitude can help reflect the heat, but I want to know … where does that reflected heat go? … Are we being told here that reflected heat is not damaging at all, but direct heat is? It seems to me that, if we had ‘global warming’, wouldn’t we want dark roofs to absorb the heat?”Plusieurs bonnes questions.... Pour un début de réponse, aller lire ce fichier PDF.
Increasing the Earth’s albedo by 0.1% would cut the average amount of solar radiation in the atmosphere from 236 to 235.6 Watts per square meter, which translates to a global cooling of just o.2 Fahrenheit degrees.À quel prix?
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1 commentaire:
Merci pour ces infos intéressantes. J'entends que le toit blanc est vraiment économique, mais je ne sais pas sur le sujet. C'est intéressant que les rues plus claires soient l'énergie, reduire des émissions, et d'autres choses.
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