is not nearly as effective as the "low CO2" option, says Marbach. It will only reduce a person's food GHG footprint by 20%, according to her analysis. But it is clear that minimising our reliance ...
So, we could not have originated in an environment that would preclude our survival, so we should not be surprised that we find ourselves in a high-O2, low-CO2 world, says Schwieterman.