I agree that the human population growth is on an exponential expansion. With the world's water usable water supply at less than 1% of Earth's water content and fast declining, humanity will need rational long term conservation policies or face extinction. Human waste products are destroying oceanic ecosystem upon which all Earth life depend. Our current social and economic course is unsustainable. President Carter once attempted reforms to align US policies to conservationist model. The public definitely rejected his vision then, I hope our current society has shifted to a more rational frame.