GLOBAL WARMING

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Across
  1. 4. – people who study and research how things work in nature
  2. 6. – creating new ideas, methods, or inventions
  3. 7. – gases or pollutants released into the air
  4. 9. floods – sudden and dangerous flooding
  5. 13. – areas of land covered with shallow water
  6. 15. transport – buses, trains, or subways used by many people
  7. 17. – tiny drops of water in the air
  8. 18. vehicles – cars or buses powered by electricity, not gasoline
  9. 20. – official documents with collected information and findings
Down
  1. 1. – a long period without rain
  2. 2. – keep something safe from harm
  3. 3. – technology to control Earth’s climate
  4. 5. energy – energy that comes from natural sources like sun or wind
  5. 8. – a powerful greenhouse gas from farms, gas leaks, and trash
  6. 10. fuels – energy sources like oil, gas, and coal formed from ancient plants and animals
  7. 11. – uncontrolled fires spreading quickly in forests or fields
  8. 12. effect – warming caused by trapped heat in Earth's atmosphere
  9. 14. – powerful tropical storms with strong winds and rain
  10. 16. dioxide (CO₂) – a gas produced by burning fuels and cutting trees
  11. 19. reefs – colorful underwater ecosystems made by small sea animals