How the New North American Trade Pact May Lead to a Sewage Cleanup of the Tijuana River Valley

Local economic and government officials Tuesday praised the new United States-Mexico-Canada deal as a way to further boost the San Diego-Tijuana cross-border economy. But an environmental concern — the runoff of raw sewage that often flows from Tijuana and fouls beaches from Imperial Beach to as far north as Coronado — might end up being one of the agreement’s most significant measures.