A. For Ozone Hole
(1) Vienna convention, 1985 for protection and maintenance of ozone layer.
(2) Montreal Protocol on substances that Deplete the Ozone Layer, 1987 (a protocol to Vienna Convention). It was established to protect ozone layer by phasing out the production of ozone depleting substances such as CFCs, halons by 1996. It gave 10 years extension period for developing countries.
(3) Toronto Summit, 1988 for reduction in the emission of CO₂.
(4) London Convention 1989: it sought (a) ban on CFC and halons by 2000; (b) recognition of methyl chloroform and carbon tetrachloride as ozone depleltors; (c) setting up of special fund.
(5) Inter – Government Panel on Climate change (IPCC) was formed in 1988 by UNEP and WMO.
B. For Global warming
1. First Earth Summit or United Nations Conference on Environment and development, 1992:
