Should citizens in the United States have a constitutional right to clean air and clean water, just as they have rights to free speech and freedom of religion? That's the broad question raised by a court decision in Montana last month. Fight for your right to clean water. In a ruling that is sure to reverberate around the country, the Montana Supreme Court held that the state's constitution guarantees all Montanans a fundamental right to a "clean and healthful environment" and protects the state's resources from potential harm as well as from actual, proven damage. "Our constitution does not require …