For a comparison of coal ash and nuclear waste, see:
http://www.scientificamerican.com/article.cfm?id=coal-ash-is-more-radioactive-than-nuclear-waste

For more on the dangers of coal ash, see:
http://www.cbsnews.com/stories/2009/10/01/60minutes/main5356202.shtml.

For a sense of the amount of nuclear waste and the space necessary to store it, see:
http://www.nei.org/resourcesandstats/nuclear_statistics/nuclearwasteamountsandonsitestorage

For more on the accumulation of nuclear waste, go to:
http://www.treehugger.com/corporate-responsibility/nuclear-waste-piling-up-across-us-138-million-pounds-and-counting.html

For a sense of radiation in nature, see:
http://www.physics.isu.edu/radinf/natural.htm

To see why you would be exposed to more radiation in Grand Central Terminal than in a nuclear power facility, see:
http://www.pbs.org/wgbh/pages/frontline/shows/reaction/interact/facts.html

For hazardous waste and the water supply, see:
www.unwater.org/downloads/Clearing_the_Waters(1).pdf

For additional information on radioactive scrap metal and how it is often mishandled, see:
http://www.nuclearpolicy.info/publications/scrapmetal.php
http://www-ns.iaea.org/meetings/rw-summaries/dijon-1998.asp.