Climate change, caused by humans, is in fact the largest threat facing civilization at this time. And it will require human technology to mitigate it. You app

Climate change, caused by humans, is in fact the largest threat facing civilization at this time. And it will require human technology to mitigate it. You appear to making denialist arguments of some kind or another and changing the subject for some reason. There is currently no threat to humanity from asteroids, supernovae, supervolcanoes, or other types of existential risks. We know anthropogenic climate change is the biggest threat facing humanity at this time.