environment

3. not done, seen, happening, etc. very often
4. to treat things that have already been used so that they can be used again
6. at risk of no longer existing
8. connected with the sea and the creatures and plants that live there
9. a very small insect that is harmful to plants. There are several types of aphid, including, for example, greenfly.
10. to stop somebody from doing something; to stop something from happening
11. any animal that gives birth to live young, not eggs, and feeds its young on milk.

1. the protection of the natural environment
2. a situation in which a plant, an animal, a way of life, etc. stops existing
4. any animal that has cold blood and skin covered in scales, and that lays eggs.
5. that is replaced naturally or controlled carefully and can therefore be used without the risk of using it all up
7. holidays in which tourists visiting a country stay with local people who live in the countryside