A day after world leaders including Prime Minister Narendra Modi vowed to unitedly fight climate change, negotiators from 195 countries began marathon talks on Tuesday to strike a historic deal to curb greenhouse gas and overcome a thorny divide on financing to developing nations. Negotiators on Tuesday scrambled to give shape to a 54-page text into a blueprint that can be approved by December 11. The conference will, for the first time in over 20 years of UN negotiations, aims to achieve a legally binding and universal agreement, with the aim of keeping the rise in global temperatures to below 2 degrees C over pre-industrial levels. Scientists estimate that if the world warms by more than 2 degrees C on average above the pre-industrial levels by the end of this century, the effects of climate change will become catastrophic and irreversible.