- Heat energy stored in soil, underground rocks, and fluids in the earth's mantle that can be tapped as a resource is called _______.
- What percentage of Brazil's motor vehicles currently run on ethanol or ethanol gasoline mixtures
- _____ automatically adjust the tint of glass to reflect or absorb light.
- Switching the United States to a smart electric grid would save the U.S. economy what amount per year over the next 20 years?
- Molten salt systems allow solar thermal power plants to produce electricity around the clockTrue or False
- Geothermal heat pumps and geothermal exchange may be used to tap the geothermal energy stored in the earth's mantle True or False
- Unnecessary energy waste costs the United States an average of
- 2.7 billion people in 77 less developed countries are facing a fuel wood crisis, requiring them to cut down wood faster than it can be replaced. True or False
- Green building certification now exists in more than 100 countries around the world.True or False
- If all costs are included for all sources, wind power is the cheapest way to produce electricity. True or False
- The U.s Department of Energy estimates that the wind farms in North Dakota, Kansas and Texas could meet the electricity needs of ___.
- Several underwater turbines have been installed to tap the tidal flow of the geothermal energy stored in the earth's mantle.True or False
- By the end of this century, solar cells will be the world's number one source of electricity according to the chief engineer for General Electric.True or False
- Because of their abundance and artificially low prices, fossil fuels will continue to be used in large quantities in the future.True or False
- Cogeneration in Denmark produces a majority of its electricity.True or False
- Which country gets 95% of its energy from renewable sources?
- Wind power is the second fastest growing source of energy worldwide.True or False
- According to the United Nations, about 60% of all the world's potential for hydro power has been developed.True or False
- Coal fired power plants waste about two thirds of the energy released by burning the coal.True or False
- Quel auteur montre l'effet de l'existence d'économies d'échelle externes (entre la suisse et la Thailand)?