The people harming the world by breathing are climate alarmists.

And plants "breathe" carbon dioxide and "exhale" oxygen.
The production of oxygen is so important that without plants we would soon use it up and die.

Funny how the balance of nature works just fine without the intervention of idiot politicians and evil de-populationists.

Well they're genociding us as fast as they can, I suppose they'll think of another way to exterminate people for their own good...