Since the origin of life on earth, there were five episodes of mass extinction of species.
(i) How is the 'sixth extinction', presently in progress, different from the previous episodes ?
(ii) Who is mainly responsible for the 'sixth extinction'?
(iii) List any four points that can help to overxome this disaster.

Explanation

(i) The current species extinction rate are estimated to be 100-1000 time faster than in pre-human times.
(ii) Human activites.
(iii) To prevent sixth extinction to take place we should
(a) prevent habitat loss and fragmentaition.
(b) check over exploitation.
(c) prevent alien species invasion.
(d) prevent coextinction.
(e) conservation and preservation of species.