US climate bill seen as sign of political shift

Environmentalists on Thursday hailed as a milestone the subcommittee approval of a US Senate bill to cap greenhouse-gas emissions.
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The bill will be debated by the Environment and Public Works Committee, and the bill's supporters hope they will approve the measure by December, at the same time as a key global conference on climate change meets in Bali, Indonesia.

The bill calls for the US to adopt a target of 15% reduction in greenhouse gas emissions by 2020.

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