Greenhouse gases rise to record levels
SWITZERLAND: The volume of greenhouse gases causing global warming
rose to a new high last year, the UN World Meteorological Organisation
said Tuesday, warning it is becoming increasingly unlikely the world can
limit rising temperatures to UN-backed targets. Levels of carbon dioxide
(CO2) -- the single most important man-made contributor to climate
change -- rose to 390.9 parts per million in 2011, which is 2.0 ppm
higher than in 2010, the WMO said.
Pointing out that the worst warming gases -- CO2, methane and nitrous
oxide -- had all reached new highs last year, the agency's
Secetary-General Michel Jarraud said "it is getting increasingly
unlikely" that a UN-backed pledge to limit global warming to two degrees
Celsius (3.6 degrees Fahrenheit) could be achieved.
"Even if we were able to stop them tomorrow, these greenhouse gases
will continue to have an effect for centuries," Jarraud said at the
launch of the annual Greenhouse Gas Bulletin report in Geneva.
CO2 levels are at 140 percent of the pre-industrial level before
1750, Jarraud said. According to the WMO, about 375 billion tonnes of
carbon have been released into the atmosphere as CO2 in the past 260
years. "These billions of tonnes of additional carbon dioxide in our
atmosphere will remain there for centuries, causing our planet to warm
further and impacting on all aspects of life on earth," Jarraud said in
a statement.
AFP
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