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Other proposals include stepped-up efforts to identify and reduce toxic pollution, promote water conservation and crack down on ship ballast discharges responsible for most of the 185 invasive species that threaten the lakes' ecosystem. The Great Lakes system holds 90 percent of the nation's surface fresh water. Yet it's under assault from sewage overflows in cities such as Cleveland, Detroit and Milwaukee. One study warned that the lakes were reaching a "tipping point" where they might be unable to heal themselves from pollution. A recent University of Notre Dame report said invasive species arriving in the ballast tanks of cargo ships cost the regional economy $200 million a year. The most feared potential invader is the Asian carp
-- a 100-pound eating machine that gorges on plankton, an essential component of the aquatic food web. Obama has pledged to finish construction of an electronic barrier in Chicago to keep the carp from invading Lake Michigan from the Illinois River. Biologists say if the carp gains a foothold in the lakes, it would be catastrophic for the region's $4 billion fishing industry. In 2006, Obama inserted $400,000 for the barrier into an emergency bill for the Iraq war and hurricane relief. Additional money was included in a 2007 package for water projects enacted over Bush's veto. Obama supported the override, while McCain sided with the president. McCain's campaign described the $23 billion measure as a budget buster, loaded with "pork barrel projects that only benefit individual congressmen and their districts." Obama's campaign said McCain's opposition showed he wasn't serious about supporting the lakes. Obama favors restoring federal authority to protect wetlands and other waterways that was eroded by Supreme Court rulings in two cases from the Great Lakes region during the Bush years, Zichal said. Scientists say loss of wetlands is a serious threat to the lakes, where they filter toxins and provide fish spawning areas. The McCain campaign did not respond to a question about his position on that issue. ___ On the Net: McCain campaign: Obama campaign:
http://www.johnmccain.com/
http://www.barackobama.com/index.php
[Associated
Press;
Copyright 2008 The Associated Press. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.
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