Polish coal unions warn of the industry's collapse without state help

WARSAW (Reuters) - Trade unions at Poland's biggest coal group, state-owned PGG, warned on Friday that the industry would collapse because of falling demand if the government did not help.Poland, which is heavily reliant on coal-fuelled power stations for its energy, is the only European Union member state not to have pledged to achieve zero carbon emissions by 2050.But in the face of growing EU pressure to reduce emissions, the ruling Law and Justice (PiS) party has encouraged investment in..