_________________ from industrialization has caused extensive damage to forests and fish populations in northern Europe.
-Acid rain
-Wealth
-none of these is correct
-New technologies
-Population growth
-Acid rain
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What percentage of the increase in global average temperature since 1980 are orbital changes likely responsible for?
A. 0% B. 10% C. 50% D. 100%
Increasing levels of carbon dioxide are one of the major contributors to global warming
Indicate whether the statement is true or false
If three samples have the half-lives listed below, which sample would remain radioactive the longest?
A. a sample with a half-life of 20 million years B. a sample with a half-life of 20 hours C. a sample with a half-life of 20 minutes D. a sample with a half-life of 20 years E. none of the above
A ________ is a volcano constructed of pyroclastic fragments ejected from a central vent.
A. shield volcano B. dome C. cinder cone D. caldera E. stratovolcano