Plastic bags are easily imported by wind and water. Plastic bags block drains, leading to flooding. Plastic bags kill birds wild life and livestock. An estimated 1 million bird's and 100,000 turtles and other sea animals die of starvations each year after ingesting discarded plastic bags which block their digestive tracks.
One set of reusable bags has the potential to save up to 20,000 bags throughout one person's lifetime. A set of 4 reusable bags will easily be able to handle a families shopping for a whole year, won't pollute, won't kill any animals and won't use non-renewable resources.