It's too late, baby, now

If you want to be an effective global warming climate change alarmist, you have to walk a fine line. You have to predict dire, truly scary cataclysms that are just around the corner, which can only be averted by massive, drastic action right now. You can't undersell the danger, because then people won't put up with all the government control you're proposing. But you can't oversell it, either, as this alarmist who didn't get the fine-line message demonstrates:

Eminent Australian scientist Professor Frank Fenner, who helped to wipe out smallpox, predicts humans will probably be extinct within 100 years, because of overpopulation, environmental destruction and climate change.

[. . .]

Fenner told The Australian he tries not to express his pessimism because people are trying to do something, but keep putting it off. He said he believes the situation is irreversible, and it is too late because the effects we have had on Earth since industrialization (a period now known to scientists unofficially as the Anthropocene) rivals any effects of ice ages or comet impacts.

Well, if it truly is "irreversible," then what's the point of any action at all, let alone drasttic action? Just shut the hell up about my damn carbon footprint and let me go on merrily consuming energy and doing my part to kill the planet.