_________________ 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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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
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%