What's the lie Brian? And who's doing the lying?
I hear from 10,000 scientists what's happening. And anyone with eyes can see the changes happening all over the world. And a handful of scientists, well compensated by the oil/gas industries, are making the argument that YOU put forth.
In the future, save the bullshit about the "climate changing all the time". Duh. We're talking about a rapid linear change brought on significantly by human activity.
And your "the world can warm by 8 degrees" is just a fabricate LIE. At that temperature many things will happen essentially all at once. (All at once in geologic time, meaning a few years pr decades.).
1) Massive ice sheets, Greenland and Antarctica melt, raising sea levels a LOT
2) Arctic ice cap melts even more, changing the albedo of the earth some
3) Permafrost melts, releasing billions of cubic feet of methane a more powerful greenhouse gas than CO2. Nothing to worry about here
4) The North Atlantic Gyre, an important ocean current, part of the Atlantic Meridional Overturning Circulation, AMOC, could shut down. This would change global weather patterns dramatically.
5) Coral bleaching will worsen; it's already serious. Coral plays a critical role in the ocean's biological diversity and health. Oh, and coral plays a big role in mitigating the effects of wave damage on shoreline, like during a hurricane.
This is a lot of things that can happen very rapidly (in geologic time scale). And they amplify each other. We're already seeing much of it in action; and the temperature hasn't risen all that much.
But you just keep your head up your ass. You'll be dead before things get catastrophic. Your kids might curse your grave; but you won't be there to listen.
And I'll be gone too. So will G. Maybe we should keep buying the really BIG gas eating cars and not worry about it. That's what Trump wants; it must be the right thing to do.