19. Needs Carbon Dioxide
For those unaware, carbon dioxide is quite a useful thing on this planet. As much bad as it’s connected to, a lot of good comes from it as well. We may not need carbon dioxide exactly as our Earth uses it, but we need something equivalent to it on the new planet.
Photosynthesis is critical to the lives of animals and humans alike. This is due to plants absorbing it and releasing oxygen, obviously critical to our lives. The problem for the Earth today, however, is too much CO2. While we do need a good bit of it, the number today is leading to a global warming effect, according to every credible environmental scientist on Earth today.