The most dramatic temperature shifts in the past few decades have been ________
A) on land near the equator B) in Arctic areas such as Canada and Greenland
C) in the inland areas of South America and Africa D) in the oceans nearest the equator
B
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People with home septic systems often flush several cups of a powdered substance down their toilets every month or two to keep their systems healthy. These powdered substances most likely contain ________
A) chemicals that bind to heavy metals to keep them from leaching into the soil B) acids that help to clean the insides of the walls of the pipes and septic tank C) chlorine and other disinfectants that help to prevent soil contamination D) bacteria and enzymes that help break down wastes
Alluvial fans are produced when flowing water loses velocity as it leaves a constricted canyon and thereby deposits a large amount of sediment
Indicate whether the statement is true or false
Which hazard is considered a biological hazard?
A. disease-carrying pathogens B. smoking cigarettes C. drinking too much alcohol D. natural flooding E. unsafe working conditions
Which of the following is an example of geoengineering to combat climate change?
A) massive scale carbon storing B) chemicals to block incoming sunlight C) iron fertilization of sea D) all of the above E) none of the above