Coal versus gas generation
According to the EIA (Energy Information Administration), the rolling 12-month total natural gas-fired (UGAZ) generation in the US[1. ended January 2016] was higher than the coal-fired generation for the first time. The trend continued in the February–April 2016 period.
The higher output from gas-fired generators turned out to be economical due to lower operations and maintenance costs, emission costs and, mainly, fuel costs. Since March 2011, the gap of total electricity (XLU) output from coal (KOL) has been shrinking compared to gas-fired (UNG) generation.