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Climate change: Warming gas concentrations at new record high

In their annual greenhouse gas bulletin, the World Meteorological Organization (WMO) says there is no sign of reversal in this rising trend.

Carbon dioxide levels reached 405 parts per million (ppm) in 2017, a level not seen in 3-5 million years.

Researchers also note the resurgence of a banned gas called CFC-11.

Read more at BBC

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