This is great stuff and I’m definitely going to be looking into Project Drawdown. My own carbon footprint hangs heavily on issues related to the 40 acres of forest land that I care for, which is a special case.
I must, however, quibble with the statement you quoted referring to “natural refrigerants such as propane and ammonium.” There’s no such thing as a ‘natural refrigerant’, because these things don’t refrigerate anything in nature. I’ll sniffily suggest that ‘natural’ be replaced with ‘simpler’. And we should recognize that these substances are not as efficient as the HFCs we use now, so we’ll end up using more electricity in our refrigerators. Did you know that refrigerators are one of the biggest consumers of electricity in many households? That’s because they operate 24/7/365. Heating and air conditioning use a lot more power, but they’re only on intermittently.