Well, first of all, I'm not American. I use the text book meaning of those words, and I generally link them to encyclopedias or acaddemic sources.

Only extreme solutions are going to stop the planet from eliminating us. It will carry on long after we are gone, but if the plankton in the sea dies, we don't have any oxygen.

We need to stop the global economy. Imports and exports have to go - the sea and air are being polluted by all the cargo carrying ships and planes.

Anyone who even remotely thinks anything else is possible will probably, at one point or another, wake up to the shock of a major world city burning to the ground and so many floods and violent weather events that people's businesses, homes, relatives, friends, etc. are just going to die and be destroyed.

At what point do you think that 'not too extreme' is going to solve all this?