Business Green: A coalition including some of the UK’s largest law firms has called upon world leaders to deliver a clear and consistent international regulatory framework, or risk undermining the effectiveness of the global climate change deal that is expected to be agreed later this year in Copenhagen. The Legal Sector Alliance (LSA), which represents 124 law firms including global players such as Linklaters and Taylor Wessing, yesterday issued a communiqué to leaders of the G20 group of nations …