A Sri Lankan man rides his bicycle during a foggy morning in Colombo on December 6, 2015. AFP PHOTO / LAKRUWAN WANNIARACHCHI / AFP / LAKRUWAN WANNIARACHCHI (Photo credit should read LAKRUWAN WANNIARACHCHI/AFP/Getty Images)
A Sri Lankan man rides his bicycle during a foggy morning in Colombo on December 6, 2015. AFP PHOTO / LAKRUWAN WANNIARACHCHI / AFP / LAKRUWAN WANNIARACHCHI (Photo credit should read LAKRUWAN WANNIARACHCHI/AFP/Getty Images)