Copper should be recycled. Copper costs less than other materials. Copper is in low demand. Copper does not make up commercial products.
There is a limited supply of copper on Earth. How does this affect the way copper is used?

Options:
- Copper should be recycled.
- Copper costs less than other materials.
- Copper is in low demand.
- Copper does not make up commercial products.

Copper should be recycled.