UNIT 5: Natural resources

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Across
  1. 2. a machine with blades that spin to produce power from water, wind, or steam
  2. 4. the supply of water to land or crops to help plants grow
  3. 8. causing no net release of carbon dioxide into the atmosphere
  4. 10. relating to heat that comes from inside the Earth
  5. 11. the act of sending out gas, heat, light, or pollution into the air
  6. 12. the process by which plants use sunlight to make food
  7. 13. the process of removing salt from seawater to make it fresh
Down
  1. 1. to produce or create something, especially energy or power
  2. 3. limited in amount and able to run out
  3. 5. knowledge or understanding of a situation or issue
  4. 6. a scientist who studies living things and how they interact with the environment
  5. 7. giving off energy in the form of radiation
  6. 9. a type of sugar that plants make and use for energy