Eric Camberos used to walk along the Imperial Beach shoreline with his mother every weekend. … The high school junior is part of a recently formed coalition called the Youth Circle. At the Imperial Beach Library this week, the group moderated a discussion on the decades-long Tijuana River sewage crisis with Camberos, county Supervisor Paloma Aguirre and Tijuana Estuary Foundation researcher Jeff Crooks. … Some Youth Circle members will travel to Sacramento next week for California Ocean Day to lobby for state legislation that would update air quality standards for hydrogen sulfide, commonly known as sewer gas. The group will also push for the Saturn Boulevard hotspot to receive Proposition 4 funding.