A different risk, and different in a way that illustrates the problems in assessing risk.
Risk is often defined as a factor of two quantities: likelihood, and seriousness of consequences. The highest risks are those that are both likely to happen and very damaging in their consequences. An example, if you are looking at risk over the next few years, is hard drive failure. It’s quite likely to happen over that time span, and absent any precautions would have serious consequences. That’s why most of us (hopefully!) have some sort of backup process in place (external drive, RAID, cloud storage etc.)
An asteroid strike is a low-probabilty, serious-conseqences event. Estimates suggest that Earth experiences megaton-yield impacts (well, that includes airbursts) several times a century, and about a year ago Chelyabinsk had a very near miss. Perhaps once every million years there’s an impact that causes global effects, such that it might kill a billion people if it hit today. Does that mean that an average of 1,000 people a year die from asteroid impact? No - because that’s a statistically misleading measure. What it does mean is that asteroid impacts fall, by some arguments, into the category of risks that are worth considering how to mitigate.
Global warming is in a different category. There is at least a medium probability that there will be climate change with serious consequences in the next few decades. (If you don’t believe there is at least a significant possibility of this, you are beholden to a dogmatic position that neither I nor anyone can argue you out of, because, to be frank, you weren’t argued into it - you hold it as a matter of faith.) As such there is a very significant risk from climate change, and it is a much more concrete risk than the risk from asteroid impact.
It amazes me that some people can competently discuss the risk of asteroid impact and at the same time dismiss climate modelling. To do this requires that you pick and choose which parts of physics you believe and/or when you believe them, and that is not the behaviour of an objectively rational person.
