Cross-border sewage flows in the Tijuana River reaching Imperial Beach are in the news and on the minds of concerned citizens of the region. Since pollution has been finding its way into the Tijuana River Valley for 40 years, it’s remarkable that it still manages to make the headlines. To be clear, I don’t condone it. I’m dismayed by sewage on a river (any river), its impact on water quality, as well as on public health. But that’s urban life in developing countries and emerging economies throughout the world.