I was thinking more about resources like clean air and water. Humans used to pollute rivers and air because they treated it as a free resource. However, the cos

I was thinking more about resources like clean air and water. Humans used to pollute rivers and air because they treated it as a free resource. However, the cost of air pollution are health problems. There is no such thing as free lunch: https://en.wikipedia.org/wiki/There_ain't_no_such_thing_as_a_free_lunch#Meanings https://en.wikipedia.org/wiki/There_ain't_no_such_thing_as_a...