sustainability

123456789
Across
  1. 2. used to fill up cars to make them go
  2. 5. are cute but some are scary
  3. 6. people cutting down trees
  4. 7. a viscous liquid derived from petroleum, especially for use as a fuel
  5. 8. we need it to breathe
Down
  1. 1. used to power computers
  2. 3. power from the sun
  3. 4. a process in which substances combine chemically with oxygen from the air and typically give out bright light, heat, and smoke; combustion or burning
  4. 6. is very cool I love it
  5. 9. a substance or matter in a state in which it will expand freely to fill the whole of a container, having no fixed shape (unlike a solid) and no fixed volume (unlike a liquid)