What percentage of the Earth's population lives in urban areas?
A) 5 B) 10 C) 15 D) 25 E) 50
E
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When two air masses collide at a front, one air mass may be pushed upward by the other. This is because ____
A) one air mass is moving faster than the other B) one air mass is denser than the other C) pressure is falling in one air mass and rising in the other D) one of the air masses encounters topographical features on the ground
Why is it that in most parts of the world local people do not benefit from the removal of fossil fuels from their local environment? Discuss the economics, politics, and environmental reasons that locals may not benefit
What will be an ideal response?
Cultural eutrophication cannot be prevented by ____.
A. banning the use of phosphate detergents B. preventing runoff of fertilizer from agricultural fields C. advanced waste treatment D. harvesting excess weeds E. soil conservation and land-use controls
Which of the following can influence whether a shoreline gains or loses sand with time?
A. the amount of sediment in rivers B. the amount of precipitation on land C. prevailing wind direction D. a longshore current E. All of these choices are correct.