Reuters: Japan plans to provide a subsidy of about 200,000 yen (US$1,887) to households that buy a solar power system to promote its use and help reduce greenhouse gas emissions, the Nikkei business daily said on Sunday. The subsidy represents 10 percent of the cost of a standard solar power system, which is about 2 million yen, it said. The Ministry of Economy, Trade and Industry hopes the subsidy will help stimulate mass production of such solar power systems and lower …