The United Nations Conference on Environment and Development was held in $1992$ in Rio de Janeiro, Brazil. During this conference, several environmental management principles were adopted by many countries. Which one of the following principles allows the governments to take mitigation measures on the environmental issues having serious threats or irreversible damage, even if there is scientific uncertainty about such issues?
- Polluters pay principle
- Precautionary principle
- Extended producer responsibility
- Common but differentiated responsibilities
