U.S. action sought on bay

As scientists and activists warned of the catastrophic effects that they said higher ocean temperatures and rising sea levels would have on the Chesapeake Bay, the governors of Maryland and Virginia called on lawmakers Wednesday to formulate a federal response to global warming.

Speaking before a Senate panel Wednesday, Gov. Martin O'Malley said the time had come for national programs to reduce greenhouse gas emissions from power plants, automobiles and other sources.

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