Climate change is happening whether or not people want to admit it. It is observable that sea ice is melting, that coastal areas are flooding more frequently and more severely. How many times should we rebuild in the Carolinas? Or Houston or Florida? Climate change is a security problem, an infrastructure problem, a humanitarian issue all rolled into one.
This is the greatest threat to the future of humanity. Just because you personally might not be alive in 2100 doesn’t mean we can piss away the future for our own benefit.
If we as a planet do nothing or continue to drag our heels, future generations will have a bleak future and it will have been our fault.