December 8, 2007
ENVIRONMENT/GREENHOUSE GAS REDUCTION
Climate scientists issue Bali Declaration
Some 200 world climate scientists issued on Thursday a Bali Declaration 2007 calling on negotiators at the ongoing climate change talks to agree on reduction of greenhouse gas emissions by up to 50 percent of the 1990 level by 2050.
The scientists stressed the need to stabilize greenhouse gas concentrations at a level well below 450 particle parts per million (ppm) in the long run.
To keep global temperatures from rising more than two degrees Celcius, global emissions need to peak and then start to decline within the next 10 to 15 years as a first step, and then be cut in half by 2050 from the level prevailing in 1990, said the declaration written under the aegis of the Climate Change Research Center at the University of New South Wales, in Sydney, Australia.
The carbon dioxide concentrations in the atmosphere have gone far beyond their natural concentration level 650,000 years ago and is rising quickly because of human activities, they said.
If releases aren't curbed soon, millions of people will be at risk from extreme events, such as heat waves, drought, floods and storms; coasts and cities will be threatened by rising sea levels; and many ecosystems, plants and animal species will be in serious danger of extinction, they said.
Asked what the scientists want to recommend at the Bali conference, Prof Richard Sommerville of the US who signed the declaration said: "We don't have suggestions for the negotiations, but we want the outcome of this conference to clearly move toward the prevention of rising global temperatures." (ANTARA)
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