The move to smaller, more fuel-efficient cars, begun in response to fuel shortages is continuing and as a result, the concentrations of all atmospheric pollutants are declining.
Answer the following statement true (T) or false (F)
False
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Tar sands
a. are principal sources of conventional crude oil b. contain large supplies of heavy oils c. constitute a small but cheap supply of crude oil d. are usable only for aviation fuel e. are predominantly located in Canada
The two most recent epochs of the Neogene Period, from oldest to youngest, are
a. Pleistocene and Pliocene. d. Pleistocene and Holocene. b. Holocene and Pleistocene. e. Holocene and Paleocene. c. Holocene and Pliocene.
As air rushes upward and spins around the low-pressure core of a tornado vortex, the air expands, cools, and, if sufficiently moist, condenses into a(n) ____________________.?
Fill in the blank with correct word
What is the source of heat in geothermal power?
A. Radioactive elements inside the Earth B. Coal burning C. Active heating by solar energy D. Combustion of synfuels