Across
- 4. To save electricity and reduce smoke, we can walk or ride a...
- 7. Vehicles like cars and motorbikes release bad... into the air.
- 10. The opposite of "dirty" when we clean up our environment.
- 11. We need to plant more green... to make our air fresh.
- 12. Thick black smoke from factories and heavy traffic causes air.
- 13. What big green area with many trees provides oxygen for Indonesia?
Down
- 1. When people throw trash into the water, the river becomes...
- 2. What should we do with our trash? Put it in the...
- 3. What electronic device should we unplug or turn off when we are not watching?
- 5. Cutting down too many trees in the forest causes...
- 6. When we turn off the lights and water when we don't use them, we... energy.
- 8. Material makes our rivers dirty and stays for a long time
- 9. Instead of using single-use plastic bottles, we should bring a...