Are there any known exoplanets with atmospheric CO2 percentages similar to pre-industrial Earth?

Jun 26, 2023 ... The atmosphere is roughly 0.04% CO2, but humans have contributed about 33% of that, not 3%, since 1850. Oct 5, 2021 ... “What matters for the atmosphere and the climate is cumulative CO2 emissions. ... Extending the analysis back to 1750 would add 0.1 percentage ... Mar 12, 2019 ... Climate change is not a real thing due to the fact that carbon dioxide only makes up a very small part of the atmosphere. ... 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 ... Sep 21, 2023 ... Worldwide, wildfires in 2021 released about 1.8 billion tons of CO2 into the atmosphere, compared to about 38 billion from fossil fuels and ... Oct 21, 2024 ... It represents the largest carbon exchange between land and atmosphere on the planet. GPP is typically cited in petagrams of carbon per year. One ... Feb 25, 2025 ... In the 200-plus years since the industrial revolution began, the concentration of carbon dioxide (CO2) in the atmosphere has increased due ... 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 9, 2022 ... CO2 is the largest component of aircraft emissions, accounting for approximately 70 percent of the exhaust. The gas mixes in the atmosphere with ... By weight, dried tree material is about 50 percent carbon. Trees also release carbon dioxide to the atmosphere as a function of their physiology. When some ...