Earth and Human Activity
Across
- 4. prevention of wasteful use of a resource
- 6. using an object or resource material again for either the same purpose or another purpose without changing the object's structure in a significant way
- 8. the total mass of organisms in a given area or volume
- 10. the natural world, as a whole or in a particular geographical area, especially as affected by human activity
Down
- 1. the presence in or introduction into the environment of a substance or thing that has harmful or poisonous effects
- 2. material that is not wanted; the unusable remains or byproducts of something
- 3. convert (waste) into reusable material
- 5. matter used as a fuel, especially in a power station for the generation of electricity
- 7. the ability to maintain or support a process continuously over time
- 9. the capacity to do work
- 11. make smaller or less in amount, degree, or size