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29 March, 16:32

Which substance is a good natural resource because it is used by plants and in fertilizer, and sometimes can be used to keep things really cold? A. silicon B. oxygen C. krypton D. nitrogen

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  1. 29 March, 16:38
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    It would because it is just b
  2. 29 March, 16:46
    0
    D. Nitrogen. The stuff Ice cream men use to keep ice cream cold is liquid nitrogen (I'ts some really cold Ice).
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