India, Sept. 28 -- China's recent declaration that it will aim to be carbon-neutral by 2060 has created a stir. Chinese leader Xi Jinping declared his country would slightly better its Paris Accord pledge by reaching peak carbon emission before 2030. There are many devils in the details, including what Beijing defines as carbon neutrality or peak emissions, but this could well be a major turning point in environmental history. China produced 9.8 gigatonnes of carbon last year, a little less than the combined carbon emissions of the United States, the European Union and India....