[TomGuy]

proposed ideas to "geoengineer" the Earth's climate

That prospect is more frightening than natural global climate changes.

"It looked good on paper, but ... "

Libs and Leftist come up with ideas, but they never look far enough in the future so foresee the unintended consequences.

[Reeses]

Windmills looked good on paper. One of their unintended side effects is they unintentionally geoengineer local climate change. Extracting large amounts of energy from the very thin band of atmosphere where all evaporation takes place changes the climate.