Global Carbon Emissions in 2010 Were Estimated to Be on the Order

Multiple Choice

Global carbon emissions in 2010 were estimated to be on the order of 9.0 * 10¹² metric tons of carbon 1 metric ton =1000 kg) in the form of CO₂.This is equivalent to _______ kg C.

A) about 2.5 * 10¹⁵
B) about 7.5 * 10¹⁴
C) about 2.0 * 10¹⁴
D) about 1.7 * 10¹³
E) about 1.2 *10¹⁵