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University student studying math and economics.

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  • kanglicheng
  • Member for 7 years, 11 months
  • 6 profile views
  • Last seen Feb 14 '16 at 20:24

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18 Storing food without refrigerator during the winter Feb 21 '13
4 Sustainability concerns with digging a well Feb 21 '13
2 Sustainable suit fabric Oct 20 '13
-2 When does using a car's start-stop system become more economical? Oct 21 '13

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