Reuters: Japan, the world’s fifth-biggest air polluter, offered a $400 million yen-denominated loan Sunday to Indonesia, the world’s third-largest air polluter, to help tackle global warming, Japanese officials said. The loan was part of the “Hatoyama Initiative” unveiled last month by Japanese Prime Minister Yukio Hatoyama, in which Tokyo will provide financial and technical assistance to developing countries to help address the problem of climate change. Hatoyama offered the loan …