03:19
What You Don't Know...: Ocean Pollution
The ocean has historically been treated as a vast dumping ground. For example, the beaches south of San Diego are closed during much of the year because high levels of pollution pose a danger to swimmers and surfers. Almost half of the homes and bus...
11:59
Water: Trans-Border Water Pollution
Because of the geography of the region and because Tijuana's sewage infrastructure has not kept pace with the city's growth, sewage enters the Tijuana River and flows into the United States. At some points, sewage flows directly onto the beach. The ...