The Environmental Protection Agency has released its 2010 data of the biggest greenhouse gas emitters in the state.
Power plants are at the top of the list.
The EPA collected data from nine different industries that emit greenhouse gases including power plants, pulp and paper mills, landfills and other industrial sources.
All told, they produced five-point nine million metric tons of greenhouse gases in New Hampshire.
About 40-percent of that comes from just one power plant, Merrimack Station in Bow.
It burns coal.