Which of the following illustrates an anthropogenic form of pollution?
A) A large plume of ash from an erupting volcano
B) Large clouds of smoke from a forest fire caused by lightning
C) Sulfur dioxide released from a coal burning power plant
D) Sea salt aerosols in the air above an ocean
C
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Buying a share of a local farmer's crop is an example of ____________________ agriculture.
Fill in the blank(s) with the appropriate word(s).
Which particle has a positive charge?
a. Neutron b. Electron c. Proton d. Photon
We expect the highest relative humidity on a soccer field during the summer on a
A) hot afternoon during a drought. B) cool evening during a drought. C) hot afternoon following a heavy rain. D) cool evening after a heavy rain.
Which country in Africa has the most productive economy on that continent?
A) Nigeria B) Sudan C) South Africa D) Ghana E) Kenya