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carbon dioxide

Plants less thirsty as climate warms: study

MIAMI: A warming planet might not dry out Earth as much as previously believed, because plants will become less thirsty as carbon dioxide in the atmosphere rises, researchers said Monday.

John Kerry urges phasing-out of toxic greenhouse gases

VIENNA: US Secretary of State John Kerry on Friday urged signatories of an international ozone pact to back the phasing-out of hydrofluorocarbons (HFCs) -- toxic greenhouse gases thousands of times more potent than carbon dioxide.