Global carbon dioxide (CO2) concentrations have reached a new monthly record of 400 parts per million, according to scientists.
The milestone was announced by the US National Oceanic and Atmospheric Administration (Noaa).
read moreGlobal carbon dioxide (CO2) concentrations have reached a new monthly record of 400 parts per million, according to scientists.
The milestone was announced by the US National Oceanic and Atmospheric Administration (Noaa).
read more