photovoltaic technologies and Environment

Use of solar energy release no CO₂, SO₂, or NO₂ gases and don't contribute to global warming. Photovoltaic is now a proven technology which is inherently safe as opposed to some dangerous electricity generating technologies. Over its estimated life a photovoltaic module will produce much more electricity then used in it's production and a 100 W module will prevent the emission of over two tons of CO₂. Photovoltaic systems make no noise and cause no pollution in operation. Solar energy is clean, silent, and freely available.

from : www.pvresources.com