I studied Atmospheric Science at Oregon State (at least our baseball team is good). rboyce understands atmospheric science better than most. He’s right that climate change probably isn’t human’s most existential threat. Wear your mask. Endocrine disruptors (e.g. from health care products, prescription drugs) are in drinking-water sources. They can effect human reproduction in concentrations measured in ppb. That’s billion. The problem I have with global climate change is that it became a political agenda, which never seems to lead to good science. Earth won’t develop human-caused run-away global warming like what happened on the planet Venus, and have molten lead on its surface, mostly because we are much further away from the sun. But there is no question we are changing our planet. We need to be careful, but not just about our carbon footprint. Sea level rise probably isn’t the catastrophe we should be focusing on right now.