TIJUANA, Baja California — We wanted to come to the source of the pollution that affects people on both sides of the border.

A channel filled with sewage and trash is about a third of a mile south of the border from San Diego and it goes through the community of Las Flores (also known as Los Laureles) in Tijuana, Mexico.

Fay Crevoshay, the Policy and Communications Director with WILDCOAST guided us as we carefully stepped through the sludge in that channel, “watch where you're stepping.”