A Kosovo citizen wearing a face mask participates in a protest against heavy pollution in Kosovo capital Pristina on Wednesday, Jan. 31, 2018. Hundreds of people staged a protest Wednesday in Kosovo’s capital Pristina, urging the government to fight extremely high pollution. Protesters blamed the government and local authorities for allowing hazardous levels of fine particulate matter, an air pollutant called PM2.5. (AP Photo/Visar Kryeziu)