Across
- 2. This contains all of Earth's waters.
- 5. This resource is a natural resource that can be replaced in nature at about the same rate it is used.
- 6. This is any energy source, organism, or substance found in nature that people use.
- 7. The type of coal that forms depends on heat & __?
Down
- 1. This is a nonrenewable energy source formed from ancient plants
- 3. This resource is a natural that exists in a fixed amount or that issued up faster than it can be replaced in nature.
- 4. Coal produces ___ that pollute air & water.