Thirty-five years after the first Earth Day galvanized environmentalists, the movement is suffering a national identity crisis. Local environmentalists say San Diego County is cultivating a vibrant environmental community interested in preserving open spaces, cleaning up beaches and pressing for cleaner air. But the green establishment can't seem to get its way in Washington, D.C., the cause of much soul-searching in the run-up to Earth Day festivities that will span the globe tomorrow. Critics contend that environmentalists lack a compelling vision and say the movement has become just another special interest. Even though environmental groups' coffers are fat and people...