Where is the Discussion on the Environment?

Why are none of the pundits or candidates discussing the dangers facing the global environment? Have the problems of global climate change, resource depletion, evaporating food and water supplies, debasement of huge swaths of our planet's surface disappeared?

While the corporate hegemony focuses on the expanding economies of Brazil, Russia, India and China (the BRIC countries), has the challenge of meeting the inevitably surging consumer demands that result from this economic expansion been solved? Has it become possible that all countries now can share in the lavish lifestyle of first world countries without endangering the already threatened ecosystem of Mother Earth?

While glaciers melt, sea levels rise, depleting fossil fuel sources open gaping holes in the ozone layer, and human population continues to grow, perhaps our species is not really accelerating its rush to extinction?

Surely if this were not the case, environmental issues would lead political and public discussion, not be largely ignored by it?