Q. Envelope of gases surrounding Earth and planets is known as:

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Q. Agricultural land has been lost due to

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Q. Vegetation covered surfaces has a low albedo level, due to light absorbed in

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Q. What does 'chlorofluorocarbon' (CFC) produce?

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Q. CFCs molecule has 5 to 10,000 times greater green house effect than

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Q. Amount of ozone in stratosphere is determined by

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Q. When did chloroflurocarbon invent?

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Q. Who discovered Antarctic 'ozone hole'?

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Q. 'CFCs' are chemically

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Q. Ozone molecules are formed through action of:

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Q. 'Ozone' is also present in the:

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Q. A chlorine atom can destroy a number of molecules of ozone in a:

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Q. Montreal Protocol was set up in:

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Q. Which GHGs are non toxic?

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Q. 'ppb' stands for

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Q. A 'stratosphere' is a well recognized region of atmosphere, having

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Q. Ozone' and 'CFCs' are destroyed by

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Q. 'CFCs' in atmosphere destroys

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Q. A molecule consisting of three atoms of oxygen is

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Q. Which gas is an extremely reactive in the

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