"There's no point bleating about the future of pandas, polar bears and tigers when we're not addressing the one single factor putting more pressure on the eco system than any other - namely the ever-increasing population."

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We're handing them [young people & future generations] a climate system which is potentially out of their control. We're in an emergency: you can see what's on the horizon over the next few decades with the effects it will have on ecosystems, sea level and species extinction

— James Hansen