September 22 (SeeNews) - Bulgaria's coal-fired power plant Bobov Dol [BUL:TBD] is investing about 100 million levs ($50.1 million/51.1 million euro) in the construction of a 100-MW solar plant which will down the track enable the production of green hydrogen to help cut the plant's carbon emissions, executive director Lyubomir Spasov told SeeNews on Wednesday.