l****z
发帖数: 29846 | 1 朱棣文建议把房顶漆成白色，既节省能源又遏制人造全球暖化。Science？
http://www.telegraph.co.uk/earth/earthnews/5389278/Obamas-green-guru-calls-for-white-roofs.html
Professor Steven Chu, the US Energy Secretary, said the unusual proposal
would mean homes in hot countries would save energy and money on air
conditioning by deflecting the sun's rays.
More pale surfaces could also slow global warming by reflecting heat into
space rather than allowing it to be absorbed by dark surfaces where it is
trapped by greenhouse gases and in | R******d
发帖数: 5739 | 2
this is not necessary a problem. You can always calculate the rough cost of
producing the paint and reducing the energy consumption from painting the
roof. You can develop a wear resistence paint that last longer. To paint
your roof is a one time expense, but reduing your energy consumption is for
years to come. Do you have those number? before you have those number, it
is simply ignorant to laugh at his point here. The problem here is probably
more about aesthetic purpose, that the roof |
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