The CNN title is "European colonizers killed so many Native Americans that it changed the global climate, researchers say." Hard to turn that into a "better" title.
Still needs to be adjusted to reflect correlation, not causation.
"1600s climate change possibly connected to European genocide of Native Americans"
I used the title CNN used.
I don't know if "your shit title" is the current title chosen by someone else. Or the CNN title chosen by someone else.