CO2 levels averaged above 410 ppm 'for the first time in recorded history' in April
Just over a year ago, atmospheric carbon dioxide (CO2) levels hit 410 parts per million (ppm) for the first time...
Record-breaking CO2 levels mark a “new era” in the world’s climate
Environmentalists around the world winced when global CO2 levels surged past 400 parts per million for the first...
