E.P.A. Investigations of Severe Pollution Look Increasingly at Risk

The agency will no longer shut down “any stage of energy production,” absent an imminent threat, a new memo says, and will curtail efforts to cut pollution in poorer areas.

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How Trump’s Canadian Oil Tariff Would Hit U.S. Refineries

The 10 percent tariff the president said he might impose in March could cause U.S. refineries to cut production and lead to higher prices.

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Trump Tariffs Could Hurt Oil Companies and Increase Gas Prices

Some oil refineries will probably struggle to replace imported crude oil if President Trump imposes 25 percent tariffs on products from Canada and Mexico.

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