What social and economic challenges are faced by rapidly growing populations and by aging populations?
What will be an ideal response?
Growing populations face problems associated with depletion of resources such as fertile agricultural and grazing land, clean water, and raw material and energy stores. Growing populations also face issues of dealing with increased pollution and waste. Aging populations face the challenges of caring for their elderly. Health care and Social Security programs may become stressed to the limit as there are fewer young workers to support those who are retired and reliant on government support. Economic growth may be compromised because of a lack of young workers, and there might be a weaker military. Upkeep of infrastructure such as schools and roads may become more challenging because of a decrease in tax revenue.
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This globe from the atmospheric moisture investigation shows specific humidity, with blue and green being highest. Which part of Africa has the highest specific humidity?
A) In the far north, close to the Mediterranean Sea
B) Along the equator
C) Near the southernmost tip, which is surrounded by ocean on three sides
If you were reading a research study on the impacts of coal-burning power plants on the environment and found out that the research was paid for by a coal mining company, could you trust the results?
a. Yes, science is objective and the outcome does not depend on who funded it. b. Yes, if I was able to look over all of their data. c. No, not unless I could find another paper not funded by a coal company that had the same results. d. No, I could never trust the results if they were paid for by a company making money from generatingthe pollution.
Which of the following is true about how shorelines are affected from the water side?
A. Waves can erode, deposit, or simply transport sediment. B. Most waves are generated by earthquakes and become larger upon approaching the shore. C. Tides increase and decrease the size of waves but leave sea level unchanged. D. Most erosion along shorelines occurs from offshore currents. E. None of these choices are correct.
Where is phytoplankton the most productive?
A) Tropical latitudes B) Temperate latitudes C) North polar latitudes D) Equator