Baku, August 8, AZERTAC Leftist leader Gustavo Petro was sworn in Sunday as Colombia’s new president with the challenge of delivering on promises to achieve social equality, fighting climate change, achieving peace in the country and ending a "failed" war on drugs, according to Anadolu Agency. Along with his running mate Francia Marquez, who became the first Black female vice president in the nation's history, Petro took over the presidency from his predecessor, right-wing President Ivan Duque.Petro, a former member of the leftist M-19 guerrilla movement and Bogota mayor, won Colombia's presidential election by a narrow margin, promising to address widespread poverty and inequality.