ve there are various greenhouse gases including CO2 and methane. Methane, I think, does nto last in the atmosphere for that long, so it is less of a problem, though it still can be one. CO2 lasts for a long time, so what CO2 we are emitting now will continue to cause warming for a long time.
A new study says we could see a 2 degrees rise in some parts of the world in our lifetime, maybe even by 2030:
Expect more deadly heat waves and more drought. I have seen some suggestions that Texas is likely to go into a permanent drought.