Across
- 3. the process of changing old items into new useful products
- 5. a sudden shaking of the Earth caused by movement in the crust
- 7. What is one type of waste that is difficult to decompose?
- 8. a large area filled with trees that is home to many animals and plants
Down
- 1. a problem caused by too much trash in the environment?
- 2. what gas to breathe that is released in plants is?
- 3. what happens when the weather is cloudy?
- 4. where should we throw the trash?
- 5. a system formed by living organisms and their physical environtment
- 6. what is the cause of throwing garbage in the river?