Central States Regional Air Planning Association (CENRAP)(site info)
Offers information about a collaboration of states and tribes concerned with reducing haze and fine particulate matter in the air. Includes the states and tribal areas of Nebraska, Kansas, Oklahoma, Texas, Minnesota, Iowa, Missouri, Arkansas, and Louisiana. Lists publications and workshop dates.
http://www.cenrap.org/
Keep America Beautiful, Inc.(site info)
A nonprofit organization whose network of local, state and international affiliate programs educates individuals about litter prevention and ways to reduce, reuse, recycle and properly manage waste materials.
http://www.kab.org/