- Citizens Against Ugly Street Spam (CAUSS)
 - Removes unsightly, illegal street signs known as street spam, bandit and snipe signs, vertical litter, telephone pole signs, and more. - Clean Ocean Action
- Coalition working to improve the degraded quality of the marine waters off the New Jersey/New York coast.
- COPA
- Dedicated to presenting information concerning the PCB problem in South Central Indiana.
 Surfers Against Sewage
- Campaign for the cessation of all marine sewage and toxic waste discharges along the British coastline.
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