Civilization Quote by Mark Steyn

But we are not going to be able to survive on this limited planet if the population keeps on growing: there isn't going to…

— Prince Philip

Our planet's lands and oceans are already stretched to meet the demands of 7 billion people. The human population continues to grow. The search…

— Ban Ki-moon

I would like to see us get this place right first before we have the arrogance to put significantly flawed civilizations out onto other…

— Patrick Stewart

This planet might be able to support perhaps as many as half a billion people who could live a sustainable life in relative comfort.…

— Eric Pianka

If we drive our fellow species to extinction, we will leave a far more desolate planet for our descendants than the world we inherited…

— James Hansen

Humankind has suddenly entered into a brand new relationship with our planet. Unless we quickly and profoundly change the course of our civilization, we…

— Al Gore

Our population and our use of the finite resources of planet Earth are growing exponentially, along with our technical ability to change the environment…

— Stephen Hawking

We think there is an ecological problem, but the real problem is irresponsible growth of human population.

— Jaggi Vasudev

I don't see much of a future for this planet. I think it's a cursed planet. The boundaries we've drawn between nations and the…

— George Carlin

Unless we stop the degradation of our oceans, marine ecological systems will begin collapsing and when enough of them fail, the oceans will die.…

— Paul Watson

Further devastation of the air, land and sea is obviously a very real possibility, unless the attitudes of politicians and all who irresponsibly exploit…

— Viggo Mortensen

“Whether we accept it or not, this will likely be the century that determines what the optimal human population is for our planet. It…

— Alan Weisman