What is it that delivers the air that we can breathe? Guess what? It's all the green things on the planet. Surely that should-- does that have a value in our economic system? Guess what? Economists call that an externality. And what I found out is, they don't care about that. It's considered so vast it's irrelevant to our economy.
for - quote - air is a resource so vast has no value in the economy - David Suzuki