Our engineering is like how we build rockets. We blow up the first few.

The problem is we have only one Earth.

And playing with it, considering how shallow our understanding is of the would-be consequent chain reactions, is monumentally stupid. Google "Cobra effect" or whatever you want. All those examples will be a child's play compared to what geoengineering's FAFO would be.

Unfortunately we aren’t very good at “engineering” nature. Nature will engineer us.