True Cost of Plastic Bags

I have always wondered how expensive plastic bags really are. The only problem is how to calculate this. I have read at more than a few sources that stores spend over $4 billion a year for these bags. That doesn’t include the full cost. These bags don’t biodegrade in landfills, and they are often littered away. In the USA getting rid of plastic bags would in theory save consumers about which is obviously not a ton of money but not inconsequential either. I wanted to take a look at the cost from another angle for this post. How much many plastic bags are needed to drive a car 1 mile.