1.What are the changes in the materials that are useful to the environment?
a.__________________________
b.__________________________
c.__________________________
2.What are the changes in materials that are harmful to the environment?
What made them harmful to the environment?
a.__________________________
b.__________________________
c.__________________________
a.__________________________
b.__________________________
c.__________________________
2.What are the changes in materials that are harmful to the environment?
What made them harmful to the environment?
a.__________________________
b.__________________________
c.__________________________
Add an Answer
More Questions From This User See All
Answers & Comments
Answer:
Composting, recycling, technological development, water cycle and photosynthesis are changes that have good effects.
a.composting
b.recycling
c.water cycle and photosynthesis