I'd like to encourage Volts to do a podcast about an easily fixable climate (and PFAS) problem the size of all internal combustion engine cars, which doesn’t require electrification. It's: F-gases vs. natural refrigerants. Interested? Can point to some interesting guest and give background info.

Question for Red Wood Materials: The only way to get much better recycling percentages than the old fashioned pyrometallurgic separation is to use chemical separation, but what exactly does that leave in terms of chemical waste water, and how is that handled and aftertreated?