Hal Clifford believes that climate change makes other environmental causes insignificant.
True, there are plenty of events Sunday marking the 38th anniversary of Earth Day. But most of the causes Americans associate with traditional environmentalism - recycling, cleaning up a local waterway, protecting a piece of open space, saving an endangered species or even cleaning up the air - well, they're pretty much irrelevant now. It's not that such green activism is ineffective...Traditional environmental concerns have been trumped by a single, overriding problem: global climate change. Henry David Thoreau asked, "What is the use of a house if you haven't got a tolerable planet to put it on?'"