Benefits in the bioenergy sector EIA estimated nearly 942 million tons of coal were used to produce electricity (U.S. Coal Supply and Demand: 1999 Review by F. L. Freme and B. D. Hong U.S. Energy Information Administration) taking an average carbon content of 75% and accounting for the molecular weight of carbon transformed to CO2, assuming 5% LOI (that is unburned carbon in the fly ash), we have about 2.4 billion tons of CO2 emitted from coal 
(EIA; estimated; nearly 942 million tons of coal) (the molecular weight of carbon; transformed; to CO2) (Benefits in the bioenergy sector EIA estimated nearly 942 million tons of coal; were used; to produce electricity) (about 2.4 billion tons of CO2; emitted; from coal) (that; is; unburned carbon) (we; have; about 2.4 billion tons of CO2)
EIA the molecular weight of carbon Benefits in the bioenergy sector EIA estimated nearly 942 million tons of coal about 2.4 billion tons of CO2 that we
estimated transformed were used emitted is have
nearly 942 million tons of coal
to CO2
to produce electricity
from coal
unburned carbon
about 2.4 billion tons of CO2