Climate change is a much slower and easier to ignore problem. Big difference between “in 100 years we will see sea levels rise by x amount” and “this asteroid will impact the earth in 714 days and will kill everyone”

There are also a lot of people making money on us not fixing climate change. There isn’t the same economic force preventing us from reacting to asteroid threats

Yeah I’d imagine if there was an extinction sized asteroid people (and money) would be mobilized very rapidly.

We also would not be aiming to do anything fancy. New solar panels that we want to raise the TRL on? Nope, we’re using a 2 decade old design. New engine with potentially 5% efficiency gain? Nope, just build a bigger spacecraft.