1. Direction: Identify the following changes that will happen in the materials in each activity
or situation. Tell whether they are USEFUL or HARMFUL in the environment.
Write your answer before the number.
1. Throwing garbage in the canal.
2. Using paper bags when shopping.
3. Throwing hospital wastes into the lake.
4. Using detergents in washing clothes in the river.
5. Using old newspaper in wrapping gifts.
6. Use cloth instead of paper napkins.
7. Use disposable plastic cups instead of glasses.
8. Use both sides of a bond paper instead of just one side.
9. Use reusable garment bags instead of disposable plastic bags
10. Allowing the flow of chemical waste in into the river.​