All countries should place limits on carbon emissions. As the weather worsens around the globe due to climate change, it is vitally important that every country support efforts to reduce emissions. India is subject to almost every natural disaster known to man from floods to earthquakes, which causes a great loss of life and property damage. It would be to their advantage to join the other responsible nations and limit emissions.
They won't do it even if they say they will. They really can't afford to. Poor countries can't really afford to go green. I think it's a much better idea to make the non government citizens of these countries wealthy. Wealthy countries are clean countries. People don't want to live in pollution, they are stuck with it.