Fourth of July fireworks displays at La Jolla Cove and Lake Murray have been traditions for years. But a new tradition has sprung up: environmentalist challenges to the annual shows. Encinitas lawyer Marco Gonzalez has given notice that he may continue pressing his case to halt these shows, even with the legal matter on hold. (And the Lake Murray fireworks have been canceled for 2012, says organizer John Pilch.) Should CEQA, the state environmental protection law, apply to once-a-year shows like these? Or should exceptions be made for displays beloved by many?