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Across 1. describes an item that is intended to be thrown away after use. (2 Words) 6. Many species of plants and animals are in danger of/threatened with extinction (= being destroyed so that they no longer exist) 9. a gradual increase in world temperatures caused by polluting gases such as carbon dioxide which are collecting in the air around the Earth and preventing heat escaping into space. (2 Words) 11. the cutting down of trees in a large area; the destruction of forests by people. 12. a substance or material that damages the natural environment 13. describes a form of energy that can be produced as quickly as it is used. (2 Words) 16. the power from something such as electricity or oil, which can do work, such as providing light and heat. There are different types of energy: solar, nuclear, hydroelectric... 18. to use less or make something smaller 19. rain which contains large amounts of harmful chemicals as a result of burning substances such as coal and oil. (2 Words) 21. the poisonous gas formed by the burning of carbon, especially in the form of car fuel. (2 Words) 22. to use again 23. a person who protects the natural world and educates others about environmental problems 25. unwanted matter or material of any type, often that which is left after useful substances or parts have been removed. 30. the process of conserving energy (2 Words) 32. strong, unpleasant and sometimes dangerous gas or smoke. 34. things such as minerals, forests, coal, etc. which exist in a place and can be used by people. (2 Words) 36. to collect and treat rubbish to produce useful materials which can be used again. (2 Words) 38. the general weather conditions usually found in a particular place. 39. to release or project something (eg. light, sound, smoke, gas, radiation, etc.) 41. a long period when there is little or no rain. 42. a large amount of water covering an area that is usually dry. 44. a fuel like oil or coal formed from very old plant and animal fossils (2 Words) 45. carrying harmful bacteria or toxins that can cause disease or death 46. an extremely large wave caused by movement of the earth under the sea, often caused by an earthquake (= when the Earth shakes) 47. to keep something in its original state

Down 2. a layer of air high above the Earth, which contains a lot of ozone, and which prevents harmful ultraviolet light from the sun from reaching the Earth. (2 Words) 3. the process by which land changes into desert. 4. the gas formed when carbon is burned, or when people or animals breathe out. (2 Words) 5. a development that is causing little or no damage to the environment and therefore able to continue for a long time. (2 Words) 6. the air, water and land in or on which people, animals and plants live. 7. the number and variety of plant and animal species that exist in a particular environmental area or in the world generally, or the problem of preserving and protecting this. 8. the planting of trees and plants to help a damaged or destroyed forest recover 10. able to decay naturally and harmlessly. 14. an increase in the amount of carbon dioxide and other gases in the atmosphere which is believed to be the cause of a gradual warming of the surface of the Earth. (2 Words) 15. endangered birds/plants/species animals or plants which may soon not exist because there are very few now alive. (2 Words) 17. to put organic waste like vegetable peels, uneaten food, grass clippings and leaves into a large container that breaks it down into healthy soil 20. describes a type of petrol or other substance that does not contain lead. (2 Words) 24. there has been a growing concern about climate change. (2 Words) 26. a thick dirty cloud at ground level caused by pollutants reacting to sunlight 27. the complex system of relationships between living things and their environment 28. to make something new from materials that have been used before 29. the protection and preservation of natural environments and resources 31. a sudden violent movement of the Earth's surface, sometimes causing great damage. 33. damage caused to water, air.... by harmful substances or waste. 35. an organization that fights for the protection of the environment. (2 Words) 37. a layer of oil that is floating over a large area of the surface of the sea, usually because an accident has caused it to escape from a ship or container. (2 Words) 40. the place in which a species normally lives 43. to put waste in the wrong place (eg. put toxic waste into a river)