Jack - I share your sadness. I'm a big fan of SCUBA, advanced open water, love biking, etc, etc. Time and time again I see us hurt our planet.
Both my mind and heart say the answer is not for gov't or presidential leadership but personal action and accountability. Seems the bigger the gov't gets the less folks do for themselves and community.
A couple years, I was in my early 30s and a group of us (30-44) helped the local boyscout troops to improve a drainage area in a local forest preserve so mountain bikers, horseback riders and hikers could use the trails, avoid washouts, and water still to drain. They worked on this project for 2+ years and most of the time it was fighting "the man" who didn't want them to do it?!
I love our land and our beautiful landscapes and wish everyone looked inward on how they can improve it on a good day while leaving it no worse every day.