It's also suicide. Shifts such as this one have caused mass-extinction events. I don't know how someone could trigger such an event, but if you want to "save the Earth" while destroying humanity, that's how you would do it. If a human had the power to pull this off, there is no guarantee they would survive the event. I don't think we have the technology or horsepower to initiate such an event, so if it happens, it's random, and we were due for it, geologically speaking.
The latter is certainly an interesting supposition.
It's also suicide. Shifts such as this one have caused mass-extinction events. I don't know how someone could trigger such an event, but if you want to "save the Earth" while destroying humanity, that's how you would do it. If a human had the power to pull this off, there is no guarantee they would survive the event. I don't think we have the technology or horsepower to initiate such an event, so if it happens, it's random, and we were due for it, geologically speaking.