7. Which of the following shows reusing waste materials?
A use the back part of the printed bond paper
B. sell old newspapers
C. collect empty bottles
D. use old tires to garden plots
8. Which of the following shows recycling waste materials?
A empty bottles turn to flower vases
B. use eco-bag in doing groceries
C. sell old newspapers
D. use newspapers as notebook cover
9. How can you prevent or minimize harmful effects of changes in the
materials to the environment?
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10. What are the 5R's?​