Coal & Oil
This forms when dead marine organisms are mixed with mud and subjected to pressure and heat for a long time.
What is oil?
The energy density of this fuel is millions of times higher than other sources.
What is nuclear?
Compared to other non-hydro renewables, this energy source is most affordable.
What is wind?
Wood, straw, dung
What are examples of biomass?
This force is responsible for hydroelectric power generation.
What is gravity?
This forms when land-based plants decompose in swamps and are heated and compressed.
What is coal?
Only CO2 and water vapor are produced when this fuel is burned.
What is natural gas?
This energy source produces the most power when the electricity it's replacing is the most expensive.
What is solar?
This is the woody structure of plants.
What is cellulose?
These structures produce the majority of hydroelectric power.
What are dams?
NOx, SOx, CO2, ash
What are types of air pollution from burning coal?
This compound is known by the chemical formula CH3.
What is methane?
This is the biggest challenge to wind energy.
What is intermittency?
This source of energy is plant-based, but requires a lot of land, water, and energy.
What are biofuels?
This type of energy harnesses intense heat near the earth's surface.
What is geothermal?
This drilling method has allowed oil extraction from unconventional sources.
What is horizontal drilling?
This process pumps high-pressure water down a well to break rock and release oil and gas.
What is fracking?
This process is how the sun produces light and heat.
What is nuclear fusion?
Perennial grasses, fast-growing shrubs or trees, algae, and food waste.
What are sources of biofuels?
High temperature, hot rock, heat pumps
What are 3 types of geothermal systems?
This set of technologies can greatly reduce CO2 emissions from new and existing coal- and gas-fired power plants.
What is carbon dioxide capture and sequestration (CCS)?
This must be cooled for several years prior to long-term storage.
What is nuclear waste?
Solar panels are this efficient at turning sunlight in electricity.
What is 15% efficient?
The particulates created and breathed lead to respiratory ailments that kill up to 3 million people a year.
What is a problem in using biomass as a fuel?
We have used nearly all of the available sites for harnessing this type of energy in the developed world.
What is hydro?