Unit 7A vocabulary

A synthetic, or human-made material. It is very useful, but it is a big problem for the Earth!

Harmful substances that affect the air, soil, and water.

The process where materials are broken down and reused as new items.

Wind, hydro, solar, and geothermal are all examples of what kind of energy?

Something that proves and idea.

Talking with someone who has a different opinion, and exchanging ideas.

To use something again.

To make something smaller, or to use less of it.

To give the right amount of importance to things.

A viewpoint or a reason.