Across
- 4. The improved use of resources to reduce waste and increase effectiveness.
- 7. The protection and careful use of natural resources.
Down
- 1. Used to prevent depletion and ensure long term sustainability.
- 2. a colorless transparent odorless liquid that forms the seas lakes river and rain is the basis of the fluids of living organisms
- 3. Scientific knowledge for normal purposes especially in industries.
- 5. the ability to do work.
- 6. The upper layer of earth in which plants grow a black or dark brown material typically consisting of a mixture of organic remains clay rock particles
- 8. The invisible gaseous substance surrounding the Earth is a mixture mainly of oxygen and nitrogen.