Heavy traffic is seen during a smoggy day in New Delhi on November 30, 2015. Some 150 leaders including US President Barack Obama, China's Xi Jinping, India's Narendra Modi and Russian President Vladimir Putin will attend the start of the Paris conference on climate change, which starts on November 30, tasked with reaching the first truly universal climate pact. AFP PHOTO / Money SHARMA / AFP / MONEY SHARMA (Photo credit should read MONEY SHARMA/AFP/Getty Images)
