My teachers in the 60s (grammer and high school) taught us that we were coming out of an ice age that that climate would get warmer. Maybe they were correct...
And my teachers in the 70s taught us that we were on the way to an ice age and the climate would get colder. Maybe they were right, then wrong, then right again, then wrong again ...
Or maybe they just don't know what's going to happen in the future.