Global warming is a quantifiable problem — at it's most reduced it is directly related to the amount of previously sequestered GHGs entering the atmosphere minus the amount of carbon that is being sunk — and to tackle it you need a quantifiable solution. That is, you need carbon emissions reductions targets.

While it is theoretically a strong argument that it is India's turn to grow their economy so they should not have to tax their cheap fossil fuel energy, it is a short-term view. India is also one of the first-in-line, down-the-line, to pick up the real global warming tab which, in their case, is a not-so-mighty Ganges.