Kyoto Protocol was endorsed at (1) CoP-3 (2) CoP-5 (3) CoP-6 (4) CoP-4.and what is it actually??????

Hi Parth,
Thank you for asking

The Kyoto Protocol was adopted at the third session of the Conference of Parties to the UNFCCC (COP 3) in 1997 in Kyoto, Japan.

TheKyoto Protocolis an internationaltreaty(agreement)to reducegreenhouse gasemissions, based on the premise that
(a)global warmingexists and
(b) human-madeCO2emissionshave caused it.

Hope i answered the question