| Toxic | | when the LD50 is 50-500 ppm |
| Bioaccumulation | | liquid hydrocarbons |
| Teratogen | | hazard from a flood or hurricane |
| heat | | largest producer of tar sand |
| Influenza | | largest consumer of fossil fuels |
| Uranium | | pumping heat generated by the sun |
| Wind | | world's worst nuclear accident |
| Netenergy | | least efficient device we use (waste 95%) |
| Ethanol | | cheapest total costing electrical energy source |
| Canada | | blood disease spread by mosquitoes |
| Anthracite | | best form of coal |
| plutonium | | causes the greatest reduction in life span world wide |
| Mutagen | | source of almost all the earth's energy |
| Birds | | nuclear fuel |
| Tobacco | | most common moderator |
| Asphalt | | converts sunlight to electricity |
| pennsylvania | | just let the sun do its thing |
| Methane | | deadliest disease |
| sun | | don't stop viruses |
| none | | our favorite nuclear employee |
| Antibiotics | | toxicity factor you can do nothing about |
| Active | | produced in breeder reactors |
| Chernobyl | | current destination of nuclear waste |
| Moderator | | problem exemplified by DDT |
| Bhopal | | three mile island state |
| China | | Provides the highest net energy for high temperature industrial |
| Water | | world leader in coal consumption |
| Distillation | | leading country in renewable energy production |
| Petroleum | | main ingredient in natural gas |
| USA | | combined heat and power for example |
| Poverty | | resistance to break down |
| Lightbulb | | fuel source for a fuel cell car |
| Hydrogen | | the nuclear dream |
| ANWR | | the total amount of energy from a resource, minus the energy |
| Homer | | the best answer to short term energy problems |
| Genetics | | radiation for example |
| Physical | | slows down neutrons |
| Lethaldose | | lowest grade distillation product |
| Conservation | | worlds leading source of biomass in developing countries |
| wood | | separates oil |
| Carcinogen | | word leader in use of hydropower |
| decline | | chemicals like those found in tobacco |
| Persistence | | useful operating life of a nuclear power plant |
| Norway | | Alcohol is a common example of this type of toxic chemical |
| Coal | | number of nuclear plants built in the U.S. since 1978 |
| Biomagnification | | bacteria and virus hazard |
| south | | leading cause of death in the U.S |
| CostaRica | | Bush's future home for oil wells |
| Malaria | | direction windows should face for passive heating |
| Photovoltaic | | biofuel additive for gas |
| Cogeneration | | problem with most heavy metals |
| forty | | worst industrial accident |
| Fusion | | what will happen to the availabilty of all fossil fuel reserves in the future |
| Nowhere | | what most energy is wasted as |
| Passive | | often killed by wind turbines |
| Biological | | when 50% of a population dies from a toxin |
