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Across 1. The arts, beliefs and other manifestations of parts of the world 5. Not able to be maintained at the current rate or level. 8. A person who travels 10. Friendly to the enviroment 11. Freely offer to do something. 14. The surroundings or conditions in which a person, animal, or plant lives 15. An extended peroid of time spent away from home 17. The wealth and resources of a country or region 18. Strengthen or support physically 19. The physical world of plants, animals, the lanscape and other features

Down 1. Protect (Something) from harm or destruction. 2. state of inadequate development 3. a species at risk of extinction 4. The planet on which we liveenda 6. having knowledge of 7. Maintain (something) in its original or existing state. 9. An eco-friendly way to travel 12. Wild animals collectively 13. A person who is traveling or visiting a place for pleasure. 16. Make a journey, typically of some length or abroad