Few humans seem to understand this.
We have cut down or burned most of the great forests, killed most of the life in the oceans, poisoned the very air we need to breathe, committed genocide and holocaust on tens of thousands of species on our planet that used to run and fly and swim in numbers too great to be counted. And we're working hard to destroy what little remains, in the holy name of money.
Something else most humans do not seem to understand is that once the food and air and water and living creatures are gone, we're not going to be far behind, as we find the money is not going to be of much use when there's nothing left to buy. Or eat. Or drink.
A Serpent's Tale - free PDF at
http://www.rudemacedon.ca/serpentstale.html