Greenhouse Gas Levels Are The Highest Ever Seen — And That’s Going Back 800,000 Years
WASHINGTON DC - Greenhouse gas concentrations in the atmosphere that contribute to climate change are the highest ever recorded — and that's going back 800,000 years. Scientists at the National Oceanic and Atmospheric Administration reported that the concentration of carbon dioxide, one of the primary greenhouse gases, hit 412.5 parts per million in 2020. That's 2.5 parts






