Across
- 4. Dinosaurs are ______ now because we can’t find them anywhere on Earth.
- 5. My Grandma’s very ______ and does all her own shopping and cooking.
- 7. Air pollution is a big ______ to our health.
Down
- 1. Vietnam has a ______ of about 102 million people.
- 2. There are thousands of ______ on Earth. Lions, kangaroos, and elephants are just a few examples.
- 3. We should stop throwing litter into rivers to ______ water pollution.
- 6. ______ animals can become extinct if not protected.