Comment Re:You mean NEOs like Russia? (Score 1) 272
Radiation and mutational evolution go really well together. So a global war will pretty much guarantee those at the simplest end of the evolutionary path, bacteria and viruses will tend to leap ahead (numbers are on their side, seriously on their side) means that a major planetary extinct will soccer and only the simplest organism will survive as they are evolutionary able to keep up with short life cycles and high numbers. There is simply huge mass of vary toxic materials in cities that simply should not be burnt and released into the atmosphere.
So a real extinction race, nuclear winter, nuclear radiation, released pollution toxins and bacterial and virus evolution ahead of much more slowly evolving complex species. Yeah, we would be fucked.
Back to meteors, if you need to do it in a desperate hurry it might be better to do nothing, because one meteor whilst still hugely destructive might be better than a radio active dust cloud on the same course. Still with proper planning and preparation, there is something very worthwhile about a astronomical impact defence, like our continued survival as a society and as a species.