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Even if governments act, climate change is in new phase

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Staff Writer | October 24, 2016
Greenhouse gases
Climate   400.0 parts per million

Greenhouse gases rose to a symbolic milestone in 2015, taking climate change into a new phase which could last generations even if governments act to curb man-made global warming, the U.N. World Meteorological Organization (WMO).

Globally averaged concentrations of carbon dioxide, the main man-made greenhouse gas, reached 400.0 parts per million (ppm) in the atmosphere for the first time on record and were 44 percent above levels before the Industrial Revolution, it said.

The relentless rise contrasts with accords by almost 200 governments to start reining in emissions, led by the Paris Agreement last year to phase out fossil fuels in favour of renewable energy in the second half of the century.

"The year 2015 ushered in a new era of optimism and climate action with the Paris climate change agreement. But it will also make history as marking a new era of climate change reality with record high greenhouse gas concentrations," WMO Secretary-General Petteri Taalas said in a statement.

"The key issue here is to go from this kind of political will to concrete action," he told a news conference in Geneva. "So far we haven't seen a major change in the behaviour."

An observatory at Mauna Loa in Hawaii, the main measuring station with records back to 1958, "predicts that carbon dioxide concentrations will stay above 400 ppm for the whole of 2016 and not dip below that level for many generations", the WMO said.


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