The international community’s over-arching concern must be to seal a serious and significant deal at the UN climate summit in Copenhagen in December to curtail carbon dioxide emissions and assist vulnerable countries to adapt. If the world is also to deploy all available means to combat climate change, emissions of all substances that contribute to it must be scientifically evaluated and urgently addressed.
Achim Steiner is UN under-secretary general and UN Environment Program executive director. COPYRIGHT: PROJECT SYNDICATE
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