1.Find the CLOSEST of “vehicles”: Greenhouse gas emissions from factories and vehicles can cause global warming A. cars B. transportation C. burning D. station
transportation
2. Find the CLOSEST of “severe”: Global warming has severe impact on water supplies and upset ecological balance A. positive B. negative C. serious D. remarkable
C.serious
3. Find the CLOSEST of “reduce”: People should change their daily habits to reduce their carbon footprint. A. rise B. raise C. decline D. remain
C.decline
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