1. Consumer Cost.
2. Production Cost.
3. City Cost.
4. Disposal and Litter Cost.
5. Ubiquitous. Everyone. Everywhere.
6. Global Warming.
7. Petroleum Depletion.
8. Loaded Landfills.
9. Wildlife.
10. Marine Life.

full list via squawkfox

1. A plastic shopping bag can take anywhere from 15 to 1000 years to decompose.
2. Plastic bags don't biodegrade, but are at risk for photo degradation.
3. The cost to recycle plastic bags so outweighs their value that most recycling facilities will not take them.
4. According to the Wall Street Journal, only 1% of plastic bags are recycled world-wide.
5. The United States alone uses approximately 100 billion new plastic bags per year.
6. Thanks to their light weight, plastic bags are the debris most likely to fly away from landfills.
7. Public agencies in California alone spend over $300 million on coastal litter clean-up per year.
8. Plastic bags make up over 10% of washed-up debris polluting the US coastline.
9. According to the British Antarctic Survey, discarded plastic bags have been found as far north as the Arctic Circle and as far south as The Falkland Islands.
10. An estimated one million birds and 100,000 turtles and other sea animals die of starvation each year after ingesting discarded plastic bags which block their digestive tracks.

full list via reusethisbag

1. Good for animals and the environment.

2. Save money.

3. Easy activism.

4. Sturdy transport for your precious cargo.

5. Help keep clutter down.

peta.org