I believe that the answer is A i could be wrong though.
Develop cost efficient methods to use solar energy
increase the use of wind power
reduce the use of coal and oil
<em>mC: 12g/mol</em>
12g ------- 6,02·10²³ a.
6g --------- X
X = (6×<span>6,02·10²³)/12
</span><u>X = 3,01·10²³ atoms</u>
---->>> A :)
The moutain ridge which circles the earth.