Mark Adams of the University of Sydney said climate change could trigger a vicious cycle in which forests could stop becoming sinks of carbon dioxide (CO2).

他指出，伴随地球变暖，林火逐渐成为碳污染的一大来源。气候变化导致恶性循环，使得森林难以再作为吸附二氧化碳的碳库。

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Venter "makes good copy, I guess, " says Mark Adams, a Case Western Reserve geneticist who was one of Venter's lieutenants for a decade.

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Mr McCann said Gerry Adams and Mark Durkan could still make a "principled decision" not to meet President Bush.

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Surrey cricket manager Chris Adams has released eight players, and needs to find a new captain following Mark Butcher's retirement.

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