The United States has an abundance of oil shale (the source of shale oil and shale gas) - possibly enough to make us energy independent. Is the processing practical? What are the environmental implications? Find out more here...
1. Oil Shale. [Wikipedia]
2. Special Report: The Great Shale Gas Rush. [National Geographic]
3. Pittsburgh bans natural gas drilling over fracking threat. [The Huffington Post]
4. Halliburton frac fluid website unsatisfying to EPA. [Examiner.com - Houston]