This is why I tend to think that the industrial revolution and technology is "the great filter" for the Fermi Paradox. Life, intelligence, agriculture, society can all occur with relatively high probability, but each planet has, at best, one shot at a technological society and a brief window solve the problems that it creates before everything collapses.
Also note that global warming is determined by the ratio of CO2 produced to the amount that was in the atmosphere before the industrial revolution. Planets with lower CO2 are actually worse off because the temperature will rise faster for the same amount of CO2. Also, Earth is helped by having a lot of oceans that absorb CO2.
Also note that global warming is determined by the ratio of CO2 produced to the amount that was in the atmosphere before the industrial revolution. Planets with lower CO2 are actually worse off because the temperature will rise faster for the same amount of CO2. Also, Earth is helped by having a lot of oceans that absorb CO2.