http://www.helium.com/knowledge/113687-los-angeles-california-why-its-the-smog-capital-of-the-world-and-why-they-hope.xml Helium.com > Environmental Awareness > Los Angeles, California: Why it's the smog capital of the world and why they have hope of change en-us Copyright Helium.com Mon, 05 May 2008 19:39:55 GMT Mon, 05 May 2008 19:39:55 GMT