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Politics : Evolution -- Ignore unavailable to you. Want to Upgrade?

To: 2MAR$ who wrote (54381)	5/8/2014 7:57:50 AM
From: Solon	Respond to of 69300

That was an interesting article. An excerpt... "Given what we know of previous mass extinction scenarios, it's clear that our biggest dangers come from habitat changes that undermine food security. So our first step toward survival has to be exploring alternative fuels that don't load our atmosphere with habitat-changing carbon. In previous mass extinctions, volcanoes and fires did the work of our industrial revolution, raising temperatures and ocean acidity without any human intervention. This time around, we need to intervene, and fast. By reducing carbon emissions, we can slow down the changes that will eventually destroy our food supplies.When thinking about the future of our survival, I often consider the words of one mass extinction expert I spoke with. A quiet man named Peter Roopnarine, he works at the California Academy of Sciences, researching now-extinct food webs. Essentially, he studies what happens when a mass extinction is making the world starve. He told me that death is what leads to death. The more life forms go extinct, the more knock-on extinctions you'll get from that fraying food web. He believes that maybe there's a tipping point, perhaps around the time when 40 percent of all species have died out, when the death toll rises in a sudden spike and hits that 75 mark that's the gateway to a mass extinction event. Death is what leads to death. When animals and plants go extinct around us, each one causes more extinctions. But the flip side is also true. Mass extinctions do not happen overnight. Each step we take toward saving our environments and the lives in them, the closer we come to saving the world -- and ourselves."