What would YOU say to world leaders now?

Swedish environmentalist Dennis Pamlin has been digging through history: the Stockholm Conference of 1972, the Rio Summit of 1992, the 1997 Kyoto Protocol.

In each summit, he found that rich, developed countries promised to support poor countries though money, better trade rules and transfer of technology.

"But again and again, rich countries have failed to live up to these promises," Pamlin told China Daily. "There are many reasons for the failures and it doesn't mean anything to blame anyone, especially since very few at the conference in Copenhagen were part of these historic summits."