UN: Greenhouse gas levels in atmosphere hit new high
The concentration of CO2 surged from 405.5 parts per million in 2017 to 407.8ppm in 2018.The concentration of CO2 surged from 405.5 parts per million in 2017 to 407.8ppm in 2018.The concentration of CO2 surged from 405.5 parts per million in 2017 to 407.8ppm in 2018.External Content
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