do greenhouse gases contribute to the depletion of ozone layer or just increase the temp. bt greenhouse gas r produced by cfc and cfc's contribute 2 da depletion of ozone layer

Asked by  | 31st Jan, 2012, 06:52: PM

Expert Answer:

  • Yes greenhouse gases like CFCs not only the increase the temperature of the earth but also depletes the ozone layer.
    • Many greenhouse gases occur naturally in the atmosphere, such as carbon dioxide, methane, water vapor, ozone and nitrous oxide, while others are man made like CFCs.
    • Normally, rays from the sun that reach the surface of the earth warms the ground and are then re-emitted as heat back into space. But carbon dioxide and gases such as methane, nitrous oxide, and ozone in the atmosphere create a blanket that traps some of the heat. This blanket acts like glass in a greenhouse: it lets warming rays through, but blocks the heat trying to get out. This heating effect results in increase in temperature of earth which is called as Global warming.This worldwide rise in temperature start melting the ice on the polar ice caps.
    • The earth has an umbrella of gas to protect it from the dangerous radiation (ultraviolet radiations ) that the sun produces. This umbrella of gas is called the ozone layer.
    • As a result of human activity, the composition of the atmosphere is changing, and the ozone layer is under threat from chemicals like CFCs .Its long time retention in the atmosphere creates threat to ozone layer.

Answered by  | 1st Feb, 2012, 12:26: PM

Queries asked on Sunday & after 7pm from Monday to Saturday will be answered after 12pm the next working day.