1. A. conserve
2. A. awareness
3. A. pollution
4. A. natural
5. A. organic
6. A. reduce
7. A. artificial
8. A. regularly
9. A. rubbish
10. A. renewable
B. fossil
C. resource
C. instrument
D. reduce
D. character
D. natural
B. difference
B. chemical
C. pesticide
B. dangerous
C. chemical
...
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