What makes wind energy "green"?
O
A. It does not cost anything at all.
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B. It does not require farming.
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C. It does not work at night.
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D. It does not require burning anything.

the correct option is c.

isotopes refers to different forms of the same element with the same atomic number but different mass number as a result of difference in their neutron numbers. isotopes have different relative atomic mass but share the same chemical properties.

aquifers are bounded above and below by impermeable rock. the driving force of groundwater movement in confined aquifers is pressure, rather than gravity.