CLEAN
| Acronym | Definition |
|---|---|
| CLEAN | Citizens League for Environmental Action Now (est. 2000; Houston, TX) |
| CLEAN | Community, Labor, Environmental Action Network |
| CLEAN | Commonwealth Law Enforcement Assistance Network (Pennsylvania) |
| CLEAN | Comprehensive Long-Term Environmental Action Navy |
| CLEAN | Comprehensive Local Environmental Action Network (Indiana) |
| CLEAN | Closed Loop Environmental Alliance Network |