Disaster Statistics (United Nations)
Natural Catastrophes (University of Oxford)
Natural Disasters Data Book (Asian Disaster Reduction Center)
Natural Hazards Data (NOAA National Centers for Environmental Information)
Some information also available in World Development Indicators.
Nuclear Energy Institute--worldwide statistics
U.S. Energy Information Administration--data for coal, nuclear, petroleum, natural gas, alternatives, etc.
Alternative Fuels Data Center--(U.S. based)