LAKEWOOD, Colo. -- Among the many framed comic strips in the Mountain States Legal Foundation president's office here is one of a Zeus-like character perched on a cloud and holding a thunderbolt. "Let's keep them off balance," the caption says. "Try to hit an environmentalist." That pretty much sums up the philosophy of the foundation launched in the late 1970s as a conservative counterweight to environmental groups' litigation efforts. Mountain States has defended the government against the likes of the Sierra Club and Defenders of Wildlife.