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Option 1 is incorrect. The Climate and Clean Air Coalition (CCAC) to Reduce Short Lived Climate Pollutants is not an initiative of the G20 group of countries. This coalition was launched by the United Nations Environment Programme (UNEP) and six countries - Bangladesh, Canada, Ghana, Mexico, Sweden, and the United States in 2012.
Option 2 is correct. The CCAC seeks to reduce short-lived climate pollutants, including methane, black carbon, and hydrofluorocarbons. These pollutants are responsible for a substantial portion of global warming and contribute to harmful air pollution.
Option 3 is incorrect as only the second statement is true and the first one is false.
Option 4 is incorrect as the second statement in the question is true. Hence, the correct answer is option 2.