Across
- 1. encourge something to develop
- 4. the act of keeping something in its original state or in good condition.
- 5. the use of natural energy in a way that does not harm the environment
Down
- 2. all the plants and living creatures in a particular area considered in relation to their physical environment.
- 3. the existence of a large number of different kinds of animals and plants which make a balanced environment