BHUBANESWAR: Even as use of polythene bags of below 40 micron were banned in the city last year, implementation of the ban is far from satisfactory with a large number of shopkeepers still using them. Not just polythene bags, the ban is applicable to gutka sachets as well. As per the Plastic Waste (Management and Handling) Amendment Rules, 2011, use of polythene bags thinner than 40 micron is banned. For a city that generates over 500 metric tonnes of garbage on a daily basis, a majority of that being plastic waste, these polythene bags result in pollution in many ways.