재활용

To separate or divide things that were together or combined.

To keep safe from harm, injury, or loss; to guard or defend.

A biological community of interacting organisms and their physical environment.

To last or continue for a certain period of time without stopping or changing significantly.

The process of making the air, water, or soil dirty and dangerous for living things.

The quality of being able to continue over a long period of time, especially without depleting natural resources.

Able to be maintained at a certain rate or level, especially without depleting natural resources or damaging the environment.

The presence in or introduction into the environment of a substance which has harmful or poisonous effects.

To release or emit substances like gas, light, heat, or energy into the outside world.

The physical world including plants, animals, landscapes, and other features and products of the earth, as opposed to humans or human creations.