6. The following are opportunities in using the 5Rs techniques except A. selling recyclable materials to junk shops B. selling handcrafted products made of recyclable materials C. buying recyclable materials and sell these to the companies D. buying more plastic bags to put more waste 7. How can we save our planet from its environmental problems? A. Be a good listener B. Be a good child C. Be a good steward D. Be a good pollutant 8. Which of the following is NOT an example of physical change? A. Dissolving of sugar in water B. Smashel
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