How dangerous is plastic bags for our environment?

Our eco friendly jute bags are mainly used by the developed countries like UK, US, Germany, France, Denmark, Netherlands, Australia, Canada, Belgium etc. But we want it should be used by the whole world. Perhaps people think that jute bags are costly than polythene bags but if we go through a calculation, we can find the actual truth. Suppose a single polythene bag cost is USD0.02, if we use 30 bags per month it costs USD0.06 so for 2 months we expend USD1.20 just to carry our everyday articles. If we use a jute bag it costs USD1.20 and it can be used at least 90 days. Most important thing is jute bags are extremely safer than polythene bags. So if we use jute bags we can save our money as well as environment. We should share this message to everybody so every people can avail this opportunity. Every year polythene bags make our world dirty. One or two countries can’t change this situation if every country does not take a positive step. Plastic bag has a long term harmful effects on environment which we can’t feel immediately but it damages the fertility of soil. So for long term use of plastic bags will create an issue on agriculture. If we don’t want to stop to use this dirty thing after few years our world would be a most dangerous location for living!