At the mouth of the Mississippi River, large concentrations of nitrogen and phosphorus flow into the Gulf of Mexico, causing nutrient overloading, algal blooms, and extremely low levels of oxygen
Which revolutions are most responsible for this problem? A) Industrial Revolution and Medical Revolution
B) Medical Revolution and Neolithic Revolution
C) Green Revolution and Industrial Revolution
D) Environmental Revolution and Medical Revolution
C
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Long scratches formed on bedrock when a glacier moves over a land surface are ____
a. tillites b. moraines c. striations d. drumlin e. cirques
In the United States, the use of hydropower
A) is likely to double in the next 20 years. B) is likely to increase by about 40% by 2025. C) will likely stay the same or decrease slightly in the next few decades. D) will decline considerably, as much as 50%, by the year 2030.
An international agreement to voluntarily limit greenhouse gas emissions is called the ________
A) Coriolis protocol B) IPCC C) Keating conference D) Kyoto protocol E) United Nations Environmental Programme
Genes for natural pesticides that are toxic to potato bugs have recently been transferred into potato plants making the plants lethal to these bugs. A main concern is that
A. natural selection will rapidly produce strains of potato bugs that are immune to the toxin in the plant. B. the cost to farmers will exceed the benefits. C. these genes will mutate to become lethal to the potato plants that contain them. D. these genes will escape from potatoes and disrupt other natural ecosystem functions.