 More on the proposal and why critics say it could stifle innovation. Also, as extreme heat grips the nation, those hoping to understand heat's real-time dangers are tuning into a relatively new CDC tool, the Heat and Health Tracker. And coming up later this hour on Possibly, is climate change funny? There's backlash all the time from climate people who are like, this is the most serious issue of our time. How dare you make jokes about it?