World has already breached carbon emission threshold

Even as nations commit to reduce carbon emissions, global carbon dioxide levels have gone past the safe limit of 350 parts per million and …

We are living in a 400 ppm world, maybe permanently

The CO2 levels in earth's atmosphere have permanently crossed the dangerous 400 ppm mark

World breached safe atmospheric CO2 levels 33 years ago

Global consumption of fossil fuels, the primary source of CO2 emissions, has gone up by 78 per cent in last three decades

Carbon dioxide crosses 400 ppm mark

Breach indicates sources of CO2 emissions in the US have gone up