Across
- 3. To...is to speak very softly.
- 4. Energy that powers most modern inventions such as fridges, TVs...
- 7. If you catch a cold easily, your ...system may not work well.
- 8. "Tiny" is the antonym of...
- 10. To be in ... is to be in danger.
- 11. A small group of people living together.
Down
- 1. Illness.
- 2. To... the land is to keep it from harm.
- 5. The practice of cutting down trees.
- 6. Green areas that are called the lungs of our planet.
- 8. A shack where tribesmen live.
- 9. Hidden tribes are ... of all modern inventions = they don't have any.