When people think of air pollution, they most often associate it with the sort of dirty discharge that can be readily seen coming from the smokestacks of coal-fired plants or even the particulate matter that is emitted from automotive tailpipes. However, the most common and potentially dangerous gases that threaten life on Earth are actually greenhouse gases.

If we wouldn't have solar power there would be no rain, no wind and no photosynthesis. But solar power isn't only meant to power the earth. Nowadays people transform solar power into electricity with solar cells.

Italian website with accurate and detailed information for alternative energy: solar and fotovoltaic panels, how they work, how they're assembled, and how much you can save every year installing one of them in your house roof.