Automobile emissions from Sacramento and the San Francisco Bay may be causing the explosion of algae growth in Lake Tahoe.
"Air pollution blowing east from Sacramento and San Francisco may have greater impact on Lake Tahoe's ecological problems than previously thought, according to scientists at the Desert Research Institute. Since 1997, DRI has collected air samples at four sites ringing the lake. Researchers are testing for the presence of gaseous nitrogen compounds, byproducts of auto emissions they suspect may play an important role in fueling the algae growth stealing Lake Tahoe's famed clarity."
Thanks to Christian Peralta
FULL STORY: Bad air from California may cause algae in Lake Tahoe

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Urban Design for Planners 1: Software Tools
This six-course series explores essential urban design concepts using open source software and equips planners with the tools they need to participate fully in the urban design process.
Planning for Universal Design
Learn the tools for implementing Universal Design in planning regulations.
Economic & Planning Systems, Inc.
UCLA Lewis Center for Regional Policy Studies
Mpact (formerly Rail~Volution)
Chaddick Institute at DePaul University
City of Piedmont, CA
Great Falls Development Authority, Inc.
HUDs Office of Policy Development and Research