[JURIST] The state of Texas filed a petition [text, PDF; press release] Thursday in the US Court of Appeals for the DC Circuit [official website] asking the court to overturn rules limiting greenhouse gas emissions [JURIST news archive] set to go into effect January 2. The petition challenges the legality [Houston Chronicle report] of a rule [75 CFR 82430 text] enacted Thursday by the Environmental Protection Agency (EPA) [official website] partially reversing its approval of the state’s Prevention of Significant…