In 1800 the main fuel used in the United States was wood. (Assume wood is cellulose, whose representative repeating formula is C₆H₁₂O₆.) In 1900, the main fuel used was coal (assume coal in this example can be approximated by pure carbon, C). In 2000, the main fuel used is oil (assume it can be represented by isooctane). Assume that in 2100 the main fuel will be hydrogen (H₂). Use a spreadsheet to prepare a graph of carbon dioxide released per kJ of energy produced (y-axis) as a function of year (x-axis) from 1800 to 2100.