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.

Seeks to improve the practice and educational standards of environmental professionals

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.