The first-ever environmental referendum was held in the state of Odisha. This referendum was conducted to determine public opinion on environmental impacts related to a local project. Odisha's initiative was a significant step toward participatory governance, allowing the local population to voice their concerns and influence decision-making processes regarding environmental issues. By engaging the community in this manner, Odisha set a precedent for other states to consider similar methods for involving citizens in environmental and developmental planning.
| Countries | Capital Cities |
| P. Jamaica | 1. Port of Spain |
| Q. Cuba | 2. Havana |
| R. Guyana | 3. Kingston |
| S. Trinidad and Tobago | 4. Georgetown |