it's contributed an estimated 1.6 kg of carbon

Here, coal powered machines melt the materials down and spin them into sheets of plastic,which are then folded into bags.By the time a bag reaches its final destination,it's contributed an estimated 1.6 kg of carbon dioxide to the atmosphere.That the same amount of carbon a car produces,driving a little over 6 kilometers.But the alternatives actually possess a much larger carbon footprint.