I can only speak to some of your questions. 2. Well the current temperature is somewhat sustainable because we haven't yet destroyed the Earth.. but that's not

I can only speak to some of your questions. 2. Well the current temperature is somewhat sustainable because we haven't yet destroyed the Earth.. but that's not really what it's about. The condition of the Earth is not the present temperature, but the present condition of the atmosphere which is becoming increasingly filled with these gases; higher temperatures are merely the consequence. The higher temperatures themselves don't contribute much to a snowballing effect, except in the case of wildfires. If tomorrow, we magically stopped emitting a net positive amount of greenhouse gases, the Earth would stabilize and return to a previous cooler state because of carbon absorption from forests and so on, but this is impossible because it would require a commitment from 7 billion people. 3. The are plenty of ways to extract gases directly but many are fairly costly and only a few hold promise of being economically profitable. Extraction of the CO2 (and other gases like methane) would certainly lower temperatures, as they trap the heat in the atmosphere that would otherwise radiate back into space. The most clear empirical evidence we have of this on a planetary scale is Venus, which has a truly hellish climate because of it's C02 atmosphere. 5. This can't be a serious question. But, actually, there is the idea of iron fertilization of the ocean where dumping granulated iron into presently lifeless tracts of would cause massive blooms in ocean life and would have a substantial carbon capturing effect. It's likely to be a very cheap solution, relative to the outsize effect it would have. 6. Biggest benefit to warming is an increase in arable land as the climate is warmer towards the poles, which should more than make up for some losses to desertification. The other benefit is increased crop yields due to more CO2 in the air. Not much of a consolation tbh.