New York Times: Japan, a major emitter of greenhouse gases and a major player in the global warming debate, announced Wednesday that by 2020 it intended to reduce emissions 15 percent from 2005 levels – a goal immediately criticized as inadequate by environmentalists and international officials. Climate-change campaigners have called on Japan to set steep targets to build momentum before global climate talks this year in Copenhagen. A strong commitment by rich countries is seen as crucial to efforts …