Select the incorrect statement$(s)$ from the following.

  • A
    It is difficult to remove solid particles from polluted water.
  • B
    It is easy to remove dissolved salts such as nitrates,phosphates,other nutrients,toxic metal ions,and organic compounds from polluted water.
  • C
    Domestic sewage primarily contains biodegradable inorganic substances,which do not decompose easily.
  • D
    All of the above.

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The $CO_2$ content of the atmosphere has increased in the last $150$ years from:

At the beginning of the $20^{th}$ century,forests covered about $.....P.....$ of the land in India. By the end of the century,this had shrunk to $.....Q.....$.

Match the following.
Column-$I$ Column-$II$
$(p)$ Increasing level of $CO_2$ $(i)$ Ozone depletion
$(q)$ $CFC$ $(ii)$ Antarctica region
$(r)$ Ozone hole $(iii)$ Greenhouse effect
$(s)$ $UV$ rays $(iv)$ Senescence of skin

Approximately $P$ fraction of the solar radiation reaching the Earth is reflected by clouds and gases,and another $Q$ fraction is absorbed by them.

The Chipko movement was successfully launched by

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