While true, it is also not as direct of a threat. CO2 is affecting us now, whereas asteroids, etc., are (thankfully) only possibilities. Serious ones, to be certain, but not immediately threatening.
Humans as a species will survive CO2, though, whereas asteroids conceivably can go from "not immediately threatening" to "Earth will be destroyed in a few years" without warning.
> not immediately threatening" to "Earth will be destroyed in a few years" without warning.
Unless the lead time is 50-100 years, years might as well be tomorrow, it's going to kill us all either way. Even that might be stretching it.
> Humans as a species will survive CO2
Maybe, personally I believe humans will cause their own extinction. I'm just not sure yet if we're going to take all life with us or not. Dealing with CO2 is a toss up between making the planet uninhabitable or completely inhospitable to life.
I went with years there to be safe as I'm uncertain about what the detection levels are like for planet-killer sized asteroids. I know we discover house-sized ones passing between us and the Moon after they whiz by.
CO2 is a direct and immediate threat.