(MENAFN- Saudi Press Agency) Global carbon dioxide concentrations surpassed 400 parts per million in March for the first time since tracking began, a US government agency announced Wednesday, dpa reported.
The rise is largely attributed to humans burning fossil fuels, said the National Oceanic and Atmospheric Administration (NOAA).
Since pre-industrial times, global carbon dioxide concentrations have risen more than 120 parts per million, with half of that rise occurring since 1980.
Carbon dioxide emissions are used as one indicator of climate change.
'It was only a matter of time that we would average 400 parts per million globally, 'said Pieter Tans, lead scientist at NOAA's Global Greenhouse Gas Reference Network. He added : 'Reaching 400 parts per million as a global average is a significant
milestone. '
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