A fire engine is seen as smoke rises from a landfill and waste incineration area at the Chempark industrial park run by operator Currenta following an explosion in Leverkusen's Buerrig district, western Germany, on July 27, 2021. - At least 16 people were injured and five missing after an explosion at the chemical park in Leverkusen, western Germany, that sent a huge column of black smoke into the air, officials said, urging residents to stay indoors. (Photo by Roberto Pfeil / AFP)