Justice Anthony Kennedy wrote the majority opinion for the case, joined by Chief Justice John Roberts and justices Antonin Scalia, Clarence Thomas and Samuel Alito--all of whom generally vote conservatively and in favor of business interests.

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In the House, Bill Thomas, chairman of the crucial Ways and Means Committee and generally an avid tax-cutter, has made sceptical noises about Mr Bush's plan.

ECONOMIST: The budget

The four generally conservative justices, John Roberts, Antonin Scalia, Clarence Thomas and Samuel Alito, are expected to argue either that Massachusetts doesn't have standing or that the EPA can decide for itself whether to regulate carbon dioxide.

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As Thomas Hoban, a food sociologist at North Carolina State University, points out, Americans generally have a more relaxed attitude towards food than, say, the French, for whom it is a cultural matter.

ECONOMIST: Sticky labels