Environmental activists are welcoming the end of electricity generation from coal in Portugal. The Pego plant located 150 kilometers (90 miles) northeast of the Portuguese capital Lisbon stopped generating recently, as Portugal became the fourth European Union country to stop burning coal to produce electricity. Portugal has no coal, oil, or gas, which are all imported, and has been investing heavily in green energy in recent decades. "Freeing ourselves from our biggest source of greenhouse gases is a momentous day for Portugal," said Francisco Ferreira, head of the Portuguese environmental association ZERO. Environmentalists are lobbying for the Pego plant not to be transformed to burn biomass out of concern for the country's forests.