crossword

1. substances that make air, water, soil etc dangerously dirty
4. waste paper, cans etc that people have thrown away and left on the ground in a public place
6. a colourless, odourless toxic flammable gas formed by incomplete combustion of carbon.
10. Image of planeta very large round object in space that moves around the Sun or another star
14. a structure such as a house, church, or factory, that has a roof and walls
15. a synthetic material made from a wide range of organic polymers such as polyethylene, PVC, nylon, etc
16. process of transplanting tree seedlings, generally for forestry, land reclamation, or landscaping purpose.
17. animals who live in the water
19. an illness which affects a person, animal, or plant a living thing that has leaves and roots and grows in earth, especially one that is smaller than a tree

2. one of the very large areas of sea on the Earth’s surface
3. an area of ground, especially when used for farming or building
5. the waste produced by industrial activity
7. the process of treating used objects or materials so that they can be used again
8. physical harm that is done to something or to a part of someone’s body, so that it is broken or injured
9. a pipe or passage under the ground that carries away waste material and used water from houses, factories etc
11. economic activity concerned with the processing of raw materials and manufacture of goods in factories.
12. a chemical substance used to kill insects and small animals that destroy crops
13. a substance that can cause death or serious illness if you eat it, drink it etc
18. place that humans habit