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Initiatives by topic
Wikipedia: Solar power in Louisiana
Neighborland, New Orleans
Louisiana Bucket Brigade, (Wikipedia): 501(c)(3) nonprofit environmental health and justice organization based in New Orleans, Louisiana. Founded in 2000, the organization works with communities neighboring state oil refineries and chemical plants to address air quality issues.
Sustainable transport activism
Wikipedia: Tammany Trace: rail trail in Louisiana occupying a former Illinois Central Railroad corridor. It has been developed into a 31-mile (50 km) asphalt trail for hiking, cycling, and wheelchair use with a parallel equestrian trail. It connects Covington, Abita Springs, Mandeville, Lacombe, and Slidell running along the northshore of Lake Pontchartrain.
News and comment
New Orleans — “Biking Boomtown” — Doubled Rate Of Bicycle Commuters In 10 Years, Apr 21 
April 19 New Orleans Earth Day Festival
Citizens data initiative