Say, LED bulbs, combined heat and power boilers, fuel cells, whatever.

FORBES: Green Energy Economics in Action

Also, Foster Wheeler builds power plant boilers that can be used to burn biomass as well as coal.

FORBES: Magazine Article

It designs and builds oil refineries, petrochemical plants, liquefied natural gas terminals and boilers for coal-fired power plants.

FORBES: Magazine Article

"Our boilers and combined heat and power turbine are over 20 years old now and like anything else it wears out, " he said.

BBC: Addenbrooke's Hospital plans ?36m energy centre

Big news that the Tennessee Valley Authority is closing 18 of its oldest and dirtiest boilers at its coal-fired power plants.

FORBES: EPA Forces Tennessee Valley Authority To Shut Dirty Coal Plants

The proposal lumps gas turbines and coal boilers into the same source category, and it holds coal power plants to a CO2 performance standard that nearly all natural gas combined cycle plants and exactly zero commercial coal power plants can meet.

FORBES: EPA Nominee Gina McCarthy Has A History Of Misleading Congress

For example, the first phase of the EU Emissions Trading program, which contained several design flaws that have since been rectified, has already been found to have reduced emissions by around 100 million tonnes of CO2 mostly by forcing a shift of load from coal to gas power plants and providing an incentive for inefficient coal plants to improve the thermal efficiency of their boilers.

CNN: Your ask the expert: Carbon trading, part 2