FRANKFURT (Reuters) -U.S. Treasury Secretary Janet Yellen said on Tuesday that the United States and Europe needed to respond to China's industrial overcapacity in a "strategic and united way" to keep manufacturers viable on both sides of the Atlantic. Yellen told reporters during a visit to Frankfurt that G7 finance ministers shared U.S. concerns about Chinese efforts to dominate clean energy industries, but did not need "detailed coordination" on trade actions following the imposition of steep U.S. tariffs on Chinese goods.