Grooming Ecophilic Fraternities (What we specialise at?)

The bulk of photovoltaic devices today are used for purely practical and economic reasons but the a potential benefit of photovoltaics is that PV is one of the most environmentally benign of any electricity generating source is still unrealized by many of us.

The Earth's temperature is a result of an equilibrium established between the incoming radiation from the sun and the energy radiated into space by the Earth. The outgoing radiation emitted by the Earth is strongly affected by the presence and composition of the Earth's atmosphere. If we had no atmosphere, as on the moon, the average temperature on the Earth's surface would be about -18°C. .

However, a natural background level of 270 ppm carbon dioxide (CO2) in the atmosphere absorbs outgoing radiation, thereby keeping this energy in the atmosphere and warming the Earth. The atmosphere causes the Earth's temperature to be about 15°C on average, 33°C above the moon's. .

Carbon dioxide absorbs strongly in the 13-19 µm wavelength band and water vapour, another atmospheric gas, absorbs strongly in the 4-7 µm wavelength band. Most outgoing radiation (70%) escapes in the "window" between 7-13 µm. .

Human activities are increasingly releasing "anthropogenic gases" into the atmosphere, which absorb in the 7-13 µm wavelength range, particularly carbon dioxide, methane, ozone, nitrous oxides and chlorofluorocarbons (CFC's). .

These gases prevent the normal escape of energy and potentially will lead to an increase in terrestrial temperature. Present evidence suggests "effective" CO2 levels will double by 2030, causing global warming of 1~4°C. This would lead to changes in wind patterns and rainfall and as a result may cause the interior of continents to dry out and cause the Earth's oceans to rise. Further increases in the release of anthropogenic gases would, of course, cause more severe effects. .