This article from <em>USA Today</em> looks at the growth of green alleys in the U.S.
Apr 13, 2009 USA Today
Green alley projects are popping up in cities all over the U.S. and Canada in an effort to make the concrete jungle a little better at absorbing rainwater. A new alley program in Los Angeles goes beyond the runoff to actively integrate these unique spaces into the urban fold. Exclusive
Jan 22, 2009 By
Los Angeles has 12,309 blocks of alleys, which make the streets pedestrian-friendly but creates a no-man's-land in the back that breeds trash-dumping and crime. Planners see opportunity in those alleys for a green future.
Sep 12, 2008 Los Angeles Times
<p>As part of a plan to utilize the city's rainwater and recycle it back to lake Michigan, Chicago has been renovating its 13,00 alleys to become permeable surfaces, where rainwater can soak back into the ground. 40 alleys have been redone so far.</p>
Jun 30, 2008 CNN
<p>Alleys are a major part of the character of San Francisco, and many parts of the city are trying to embrace these unique aspects of the urban makeup.</p>
Mar 31, 2008 The New York Times