> If the US pollutes too much (for example's sake) and the ice shelf at the North pole melts, you're gonna feel it all over the world because the water will ris

> If the US pollutes too much (for example's sake) and the ice shelf at the North pole melts, you're gonna feel it all over the world because the water will rise equally. "If the US pollutes too much", droughts and other rare-ish weather events in South America, Africa and South Asia will displace more people and lead to more instability. That's a much more tangible threat in our lifetimes...