Rubbish such as paper, cans, and bottles left lying in an open or public place.
Litter
An intergovernmental organization that aims to maintain international peace and security, develop friendly relations among nations, achieve international cooperation, and be a centre for harmonizing the actions of nations.
The United Nations
A formal agreement between individuals or parties.
Pact/accord
The production and discharge of something, especially gas or radiation.
Emission
