| http://www.w3.org/ns/prov#value | - ng blitz last week in support of warming legislation.Their support is indispensable, Markey said of the companies.Beyond political strategy, Alcoa executives say, the scientific evidence has convinced them that carbon dioxide and other greenhouse gas emissions contribute to global warming and could wreak havoc in the future.Many also have concluded that the greener, more energy-efficient world O
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