Greenhouse Gas Levels Are The Highest Ever Seen — And That's Going Back 800,000 Years
Scientists said the concentration of carbon dioxide, which contributes to climate change, is the highest in data going back 800,000 years, based on ice core records.
Greenhouse gas concentrations in the atmosphere that contribute to climate change are the highest ever recorded â and that's going back 800,000 years.
Scientists at the National 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 per million higher than what in 2019, and it's now the highest ever observed, the scientists say.
