Nuclear weapons - This is totally in our control.
Clathrate gun - Control climate change. This could get out of hand if we don't act fast. Colonizing the solar system is a good option.
Supervolcano - While there'll be some seismic activity detectable, this one's a major risk. Can erupt at any time with short notice.
Impact event - This one should be predictable. There are ways space programs could deflect the impactor away from Earth.
Red giant sun - Colonization outside the solar system.
Death start - We're screwed.
We can definitely prepare for all of them.
Nuclear weapons - This is totally in our control.
Clathrate gun - Control climate change. This could get out of hand if we don't act fast. Colonizing the solar system is a good option.
Supervolcano - While there'll be some seismic activity detectable, this one's a major risk. Can erupt at any time with short notice.
Impact event - This one should be predictable. There are ways space programs could deflect the impactor away from Earth.
Red giant sun - Colonization outside the solar system.
Death start - We're screwed.