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Across 1. all people of about the same age 2. the success you achieve when you win a battle, game, election etc 4. ideas and activities relating to gaining and using power in a country, city etc 8. a system of government in which every citizen in the country can vote to elect its government officials 10. the physical or mental energy that is needed to do something 14. a situation that causes difficulties 15. the air, water, and land on Earth, which can be harmed by man's activities 17. the activity of buying, selling, or exchanging goods within a country or between countries 18. the solid dry part of the Earth's surface 19. to suddenly fall down or fail do something or become too weak to continue

Down 1. the process by which businesses or other organizations develop international influence or start operating on an international scale 3. all the money, property, skills etc that you have available to use when you need them 5. a large boat used for carrying people or goods across the sea 6. an important meeting or set of meetings between the leaders of several governments 7. something that you use to fight with or attack someone with, such as a knife, bomb, or gun 9. protection from bad things that could happen to you 11. a list of the times at which buses, trains, planes etc arrive and leave 12. to oppose or fight against someone in authority or against an idea or situation which you do not agree with 13. a description of what is likely to happen in the future, based on the information that you have now 16. the way in which plants, animals, and people are related to each other and to their environment