Japan’s largest steelmaker fought to take over its U.S. counterpart with heavy lobbying in D.C. and trips to Pennsylvania, including Pittsburgh Steelers games.

With U.S. Steel’s $14.9 billion sale to Nippon Steel made official last week, environmental advocates say it’s time for corporate leadership to take make real strides toward limiting pollution. “U.S.

The deal by Japan’s top steelmaker creates a formidable global competitor and helps revive U.S. Steel’s competitiveness.