With India's ratification of the Paris Agreement on combating climate crucial to the accord coming into force early, UN Secretary General Ban Ki-moon is lobbying New Delhi to approve it.
He has reportedly been in contacts with Prime Minister Narendra Modi and other officials.
"There have been contacts between the Secretary General and the Prime Minister and at other levels, and I think it's no secret that the Secretary General very much hopes that at the climate event which will be coming up next week, more countries will be bringing their instruments of ratification," his spokesperson Stephane Dujarric told the media in the United Nations.
"We fully understand that there are different constitutional processes in different countries. Some take more time. Some take less time," Dujarric explained.
He gave example of European Union, which is also lagging in ratifying the agreement.
"We know that the EU is in a particular spot where all of them have to agree before any can," he said.