"We don't really understand what we're doing..."
This is really understated, as too many of us really do not understand the consequences of our actions. And, as usual, our pursuit to find answers is typcially short sighted, and too often ends up compounding the problem.
Of all the 'E' issues (Economy, Energy, Education, Environment...) we can't move forward without clean air, clean water, and healthy soils to grow our food.
What I truly don't understand is attitudes like the 'pizzaman' above. Just stick our heads in the sand?