Easy, nuclear. We put more radiation into the air with coal ash then we have ever released with nuclear power. http://www.scientificamerican.com/article.cfm?i

Easy, nuclear. We put more radiation into the air with coal ash then we have ever released with nuclear power. http://www.scientificamerican.com/article.cfm?id=coal-ash-is-more-radioactive-than-nuclear-waste http://www.scientificamerican.com/article.cfm?id=coal-ash-is... (first article I found - there are plenty)