Dollars, health, and security case for renewable energy. “No Miracles Needed:  How Today’s Technology Can Save our Climate and Clean our Air”, Dr. Mark Z. Jacobson. Planet Philadelphia airs on 92.9 FM in NW Philadelphia & gtownradio.com, 4-5:00 PM ET the 1st & 3rd Friday/month. Support Planet Philadelphia environmental radio show and Gtown Radio at https://gtownradio.com/donate/.