Carbon dioxide pollution 'now at record high'

World carbon dioxide pollution levels are accelerating and reached a record high in 2012, the UN weather agency says.

Carbon dioxide pollution 'now at record high'

World carbon dioxide pollution levels are accelerating and reached a record high in 2012, the UN weather agency says.

The heat-trapping gas, pumped into the air by cars and chimneys, was measured at 393.1 parts per million last year, up 2.2ppm from the previous year, said the Geneva-based World Meteorological Organisation.

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