segunda-feira, maio 25, 2009

Contabilizar a energia e a toxicidade

Some naysayers argue that solar panels don't make sense because it takes so much energy to make them--mining, smelting or refining, processing, etc. Do they really save fossil fuel energy and greenhouse gas emissions over the long run? The simple answer is yes. They save a whole lot. But then the question is: what kinds of solar panels are better than others?

Solar Carbon Payback