Instead of physicists teaching physics, physicists should go home and see what physics applies to their home.

The American lawn uses more resources than any other agricultural industry in the world. It uses more phosphates than India and puts on more poisons than any other form of agriculture.

The extinction rate is so huge now, we're to the stage where we've got to set up recombinant ecologies. There are no longer enough species left, anywhere, to hold the system together.

Freezing concentrates sugar (maple sugar), alcohol, and salt solutions as efficiently as heating distils water or alcohol from solutions. Open pans of maple sugar can have the surface ice removed regularly (each day) until a sugar concentrate remains. Salts in water, and alcohol in ferment liquors can be concentrated in the same way.

Most modern homes are simply uninhabitable without electricity - you couldn't flush the toilet without it. It's a huge dependency situation.

Pollution is an unused resource.

I think Americans are so poor it's pitiful, because you don't understand the natural world at all.