Existing technology could cut the pollution from power stations to a fraction of its current levels if only it were installed. The European Environment Agency has been looking at emissions of acidic pollutants nitrogen oxides (NOx) and sulphur dioxide (SO2) from 450 of the continent's biggest power stations. The large combustion plants (LCP) include those which burn coal, gas or oil and their combined emissions account for almost three quarters of the total from this sector.