All we do now to save salmon could mean nothing

The Pacific Northwest has spent two decades retooling dams, rebuilding damaged watersheds and restoring stream flows to keep salmon from disappearing. The United States has invested billions in the effort - $350 million in 2004 alone - by far the most money spent on any endangered species. But a new threat is more devastating than the gill nets that sent dozens of salmon runs into extinction. It is more deadly than the hydroelectric turbines that still kill millions of migrating smolts. In fact, it raises doubts about whether salmon will survive in the Northern Pacific at all. Climate change already has made rivers warmer and spring runoff earlier, disrupting the life cycle of the fish that are an icon of the region. No matter what actions the world takes to reduce greenhouse gases, river temperatures in more than half of the lower-elevation watersheds may exceed 70 degrees by 2040 - too hot for salmon...Idaho Statesman