We've been kind of lucky on this front. Comet/small asteroid impacts in historical times have taken place in remote locations, particularly Siberia. A comet or especially an asteroid striking in a heavily populated area could be disastrous.comet impacts (0
One would hope so. Forest fires are integral to the health of the forest.Do we have any speculation/support for forest fires giving a benefit? Increased tile fertility, etc. Also, will the forest regenerate on its own after the disaster has run its course?