TXU, the Texas energy company that has been battling environmentalists over its plans to build 11 coal-fired power plants, is being acquired by two private equity firms [Kohlberg Kravis Roberts, Texas Pacific Group] that say they will scale back those plans dramatically, and turn the utility into an environmental leader... TXU will support federal legislation regulating carbon emissions...[Its] executives will be paid more if their operations emit less. [also refers to Goldman Sachs; protests against Merrill Lynch over financing coal-fired power projects]