Climate change is "severe and so sweeping that only urgent, global action" can head it off, a United Nations scientific panel said in a report on global warming issued Saturday.
The report produced by the Nobel prize-winning panel warns of the devastating impact for developing countries and the threat of species extinction posed by the climate crisis.
U.N. Secretary-General Ban Ki-moon, presenting the Intergovernmental Panel on Climate Change report in Valencia, Spain, warned that some of the effects of rising levels of greenhouse gases may already be irreversible.
The U.N. head said the situation was already "so severe and so sweeping that only urgent, global action" could head off the crisis.
The report warns that in spite of the protocols adopted by many Western countries after Kyoto, greenhouse gas emissions will continue to rise by between 25 and 90 per cent by 2030.
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