More than 700 kg are released in Bulgarian atmosphere as a result of coal combustion by households, TPPs and big industrial processes, including electricity generation. These are the results of the organisation's report called “Buried secrets of coal” which discusses the damages that coal cause to the soil in Bulgaria.

Some 3.3 tons of lead were released in the atmosphere in 2010-2013 in Bulgaria. TPPs and households account for about one third of this amount.

Coal-fired TPPs are the main source of lead in nature.