Doesn't it make sense that H2 would escape much faster than CO2 or any heavier compounds that are in the atmosphere? It seems intuitive that Jean's Escape time would predict this. I was trying to think of how it could be possible to speed up the escape time of CO2 and push it out of the atmosphere, but then I read this bit on wiki. Hydrodynamic Escape seems incredible! Some estimates indicate that nearly all carbon on Earth is contained in sedimentary rocks, with the atmospheric portion being approximately 1/250,000 of Earth's CO2 reservoir.[citation needed] If both of the reservoirs were released to the atmosphere, Earth's atmosphere would be even denser than Venus's atmosphere. Therefore, the dominant “loss” mechanism of Earth's atmosphere is not escape to space, but sequestration.