MarketWatch: The technologies needed to significantly reduce carbon dioxide emissions in Japan by 2020 will cost consumers and businesses a total of 52 trillion yen (about $500 billion), according to a published report citing a new study from the country’s Ministry of Economy, Trade and Industry. Dramatically reducing the emissions, which contribute to climate change, is a stated goal of the Japanese government, according to a report in the Wednesday edition of the Nikkei Business Daily. But …