World carbon dioxide pollution at record high
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World carbon dioxide pollution levels in the atmosphere reached a record high in 2012 and are still accelerating, the UN weather agency said yesterday.
The heat-trapping gas, pumped into the air by cars and smokestacks, was measured at 393.1 parts per million last year, up 2.2 ppm from the previous year, the Geneva-based World Meteorological Organization said in its annual greenhouse gas inventory.
That is far beyond the 350 ppm that some scientists and environmental groups promote as the absolute upper limit for a safe level.
As the chief gas blamed for global warming, carbon dioxide’s 2012 increase outpaced the past decade’s average annual increase of 2.02 ppm. The agency says the carbon dioxide level is expected to cross the 400 ppm threshold by 2016.
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