2024-12-28 02:07:21
From 2009: "As an example, he said that Earth's atmosphere currently has about 338 parts per million of CO2 and that in Navy subs, the danger level for carbon dioxide isn't reached until the air has 8,000 parts per million of CO2." Reduction could hinder plant growth. [Link] NEEDS_MORE_RATINGS(2-0-0) Author