Pro-business types are aghast at Texas Gov. George W. Bush’s (R) recent announcement that he believes global warming is underway. Bush, the top GOP presidential contender, said he changed his position after meeting with advisers who agree that there is “some warming, but disagree about its cause and impact.” The head of the Environmental Defense Fund met with Bush in March and discussed the issue, EDF officials said. Some observers think Bush is trying to polish up his environmental record in anticipation of a run against Vice Pres. Al Gore, who has a history of strong green leanings.