My thoughts are yes we the humans cause some of this global warming but IMO opinion we should fix current problems and not worry about the future.
IMO some how mother nature will provide a volcano eruption or a comet hitting earth which will block sunlight and cool things down.
Well then you can shut the EFF up about your big worry about your grandkids then ... remember ? so not to worry, someone or something will happen right at the moment your kids are under attack .. like a volcano or a clown will appear, some darn thing . .great ! .. ... Whatever it takes to not hear that crap from you again . .is good for me