The U.S. International Trade Commission (ITC) this week recommended imposing tariffs on U.S. imports of crystalline silicon photovoltaic cells (CSPV) after finding last month the imports were causing serious injury to the domestic production of the cells. Tuesday’s action was the latest in a closely watched case that many, including solar’s trade group — the Solar Energy Industries Association — are saying could impede the growth of the solar industry in this country.