With global carbon dioxide emissions rising 3 per cent in 2011, and the Kyoto Protocol set to expire at the end of 2012, environmentalists say climate change negotiations in Doha, Qatar from November 26- December 7 are more important than ever.

Most scientists believe that humans must keep global temperature rises below 2 degree Celsius to avoid catastrophic climate change. But if current trends continue, that goal will be impossible.

Al Jazeera assembled a panel of leading environmentalists who discussed in a Google Hangout the issues facing governments, companies, non-governmental organisations and policy makers during the COP18 negotiations.

Source: Al Jazeera