

WALKER: Humanity is overwhelming the planet


"We urgently need action on climate change, but even if we get it, there are larger issues. It’s not just climate. Humanity is overwhelming the planet, its resources and its life-supporting capacity. We are not in any danger of extinction, not yet anyway. But the human juggernaut — and the needs and aspirations that propel it — is headed for a day of reckoning," says columnist Robert Walker.