Business Green: Japan hinted late last week that it could water down its ambitious goal of cutting emissions 25 per cent by 2020 if attempts to agree an international climate change deal at the forthcoming Copenhagen talks fall through. The country drew plaudits from environmental groups last month when newly elected prime minister Yukio Hatoyama announced he was upgrading its emissions 2020 target. However, speaking to Reuters on Friday, environment minister Sakihito Ozawa stressed that the …