What percentage increase does the current CO2 level represent compared to pre-industrial times?

Jun 12, 2023 ... How can such a small amount of carbon dioxide in the atmosphere—only around 420 parts per million—cause so much warming? Listen with. Speechify. May 18, 2023 ... ... atmosphere is cooling dramatically because of rising CO2 levels. ... The depth of the stratosphere has diminished by about 1 percent, or ... ... atmosphere by about 10 percent since the beginning of the century. Roger ... atmosphere from the infrared radiance of atmospheric carbon dioxide. Jun 14, 2021 ... The study found CO2 levels of more 1500 parts per million (ppm) in the atmosphere associated with extreme global warmth 50 million years ago, a ... Jun 6, 2017 ... The Earth's mantle is full of trillions of tons of carbon alone, and if even a small percent of it were added to the atmosphere, it has the ... Apr 21, 2023 ... Carbon dioxide makes up only about 0.04% of the Earth's atmosphere, but that seemingly small figure ignores threat CO2 poses to the climate. Dec 7, 2023 ... Today atmospheric carbon dioxide is at its highest level in at least several million years thanks to widespread combustion of fossil fuels ... Jun 26, 2023 ... The atmosphere is roughly 0.04% CO2, but humans have contributed about 33% of that, not 3%, since 1850. Feb 23, 2022 ... About 3.2% of all CO2 in the atmosphere is man-made. (DOE 2000). About 44% of man-made CO2 is coming from coal-fired power plants worldwide. ( ... ... percent of fossil-fuel emissions stay in the air. From climate.nasa.gov. © NASA. If we split our atmosphere today into 1 million parts, 421 of them would be ...