While earlier it was only paddy stubble burning that had Punjab officials on its toes after harvesting in October-November, now the trend to burn wheat stubble is catching up among farmers.
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/stubble-burning-punjab-study-nagpur%E2%80%99s-initiative-using-agri-waste-briquettes-cremations
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/indian-express-chandigarh
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/punjab
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/air-pollution
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/agriculture
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/crops
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/crematoriums
[8] http://admin.indiaenvironmentportal.org.in/category/thesaurus/state-pollution-control-board-spcb-0
[9] http://admin.indiaenvironmentportal.org.in/category/thesaurus/central-pollution-control-board-cpcb