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At the onset of winter every year, stubble burning is invariably blamed for the smog in and around Delhi. What are the other factors contributing to smog? Suggest alternatives for disposal of the stubble. https://upscexpress.com/2019/03/10/at-the-onset-of-winter-every-year-stubble-burning-is-invariably-blamed-for-the-smog-in-and-around-delhi-what-are-the-other-factors-contributing-to-smog-suggest-alternatives-for-disposal-of-the-stub/