Why not calling it "planetary engineering" from very beginning? The experience gained in here will not be limited to Earth! Also, I think that the ambition of

Why not calling it "planetary engineering" from very beginning? The experience gained in here will not be limited to Earth! Also, I think that the ambition of changing the atmospheric composition can be a little bit higher. The talk now is (only) about the removal of CO₂ from the atmosphere (releasing back the oxygen, I guess), but an increase in the atmospheric proportion of oxygen, from sources other than carbon dioxide, would be beneficial too (at least for humans, as the blood thickness would drop and so would do a lot of the cardiac related issues). Currently there is a great deal of oxygen trapped in different kinds of oxides (SiO₂ especially) that would to us more good in the atmosphere.