4. Which of the following changes in the materials is useful to environment
a. throwing garbage in the canal
b. using paper bag's when shopping
c. throwing hospital waste into river
d. using plastic bags when shopping
5. If you are going to dispose waste materials commonly found at home, what are you going to do with the decaying materials?
a. make a compost
b. mix them with the non-decaying
c. throw them in the river
d. keep them in the cabinet and use them again​