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"Rare earths" is a collective name for 17 different elements; pressumably each of them would have a different price.
they form above earths surface (THIS ANSWER IS NOT CORRECT) They Form BELOW earths surface(:
no
78%Nitrogen,1%Other and 21%Oxygen
yes this is true.
the troposphere
troposphere troposphere
troposphere
troposphere
The Troposphere
troposphere
the troposphere
the troposphere.
troposphere
No, it occurs in the Troposphere.