General Motors Corp. and other carmakers lost a bid to block carbon-reduction rules in Vermont, suffering a defeat in the first case to challenge states' right to regulate pollutants linked to global warming... Dave McCurdy, president of the Alliance of Automobile Manufacturers, an industry trade group that joined the car companies in suing, said the group is considering an appeal... Governors of...[13] states sent a letter to chief executive officers of GM, Ford Motor Co., Toyota Motor North America and three other automakers today asking that the industry drop legal challenges to their efforts to lower carbon emissions...