In the 1970s and 1980s, CFCs were widely used in ________

A) refrigerators and aerosol cans B) light bulbs and electronics
C) coal-fired power plants D) snowmobiles and motorcycles


A

Environmental & Atmospheric Sciences

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In the United States, wood and wood waste could account for 2% of energy use. How many Btus of energy are generated from wood and wood waste? State your assumptions.

What will be an ideal response?

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Coal is a detrital (clastic) sedimentary rock. Indicate whether the statement is true or false

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Groins are short walls built parallel to shore to keep sand from moving.

Answer the following statement true (T) or false (F)

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Global temperatures probably have not varied by more than ____ during the past 10,000 years

a. ?0.5°C b. ?1°C c. ?2°C d. ?4°C e. ?5°C

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