India's challenge has deepened because, in at least 12 of the G20 economies, the net zero goal has either been adopted or is under discussion, with China being one among the latest entrants to the club. A net zero goal by 2050 is not an unqualified demand of the Paris Agreement, which only asks the signatories to furnish their commitments in a time-frame of five or 10 years. There is, of course, an expectation that each country will develop a long-term low-emission strategy for growth. But, the goal of net zero has caught on after the Intergovernmental Panel on Climate Change (IPCC) mentioned, in its 2018 report, about limiting global warming through net zero emissions by mid-century.