3. A long-term diet lacking trace amounts of iodine may result in
4. A severe shortage of food accompanied by long-term hunger of most of the population, many deaths, and social disruption is called
5. Ironically, those who are overnourished face similar health problems of those who are undernourished.
6. These foods provide almost 50% of daily calories consumed by people of the world.
7. Industrialized agriculture is also called high-input agriculture because
8. Which type of farming is most used by the poor tropical farmer?
9. Soil "layers" of distinctive composition are called soil
10. The green revolution was made possible by large inputs of water, fertilizers, and pesticides, increasing the number of crops grown per year per plot of land, and
11. For thousands of years we have been modifying plants by crossbreeding and hybridization. These processes have yielded the domesticated crop plants we eat today. Aside from the 10-15 years it takes to develop a new variety of tomato or corn, what disadvantage is there to new varieties produced by this method?
12. Meat animals (primarily cattle, pigs, and chickens)
13. The fastest growing area of food production currently is
14. The "blue revolution" refers to
15. Topsoil erosion leads to
16. Repeated annual application of irrigated water in dry climates leads to a buildup of salts in upper soil layers in a process called
17. Genetically modified (GM) foods
18. The kind of chemical used to kill pest plants is called a/an
19. An old method of farming has been found to be helpful in keeping pest populations low. This practice is
20. In order to help improve food production, governments sometimes ________ as a way of helping farmers.
21. Terracing, contour planting, strip planting, and wind breaks all have this in common: they are mainly used to
22. In terms of being healthy and living longer, studies indicate the poorest diet
23. The world's single biggest cause of illness is
24. We interfere with the Hydrologic Cycle if we
25. Fortunately, the resource freshwater is fairly evenly divided throughout nations and continents.
26. Groundwater refers to
27. Annual surface runoff in rivers and streams not lost by seasonal floods, and therefore available for human use, is called
28. One in ________ people per year lack regular access to enough clean water for drinking, cooking, and washing.
29. The current land area experiencing severe or extreme drought is approximately
30. Water is limited, resulting in competition for this resource. In the U.S., competition for water results in
31. Cities provide water to their citizens. The majority of these citizens
32. Aquifers
33. Land subsidence and sinkholes are problems that sometimes occur as water is withdrawn. These sometimes occur in/at/beneath
34. Hydroelectric dams along large rivers
35. For desert cities such as Las Vegas, Nevada, aquifers and ground water have been depleted. The city recycles its water used in bathing, swimming pools, and fountains. Given the need for drinking water in such a large city, the source of the water must be
36. There are no disadvantages of hydroelectric dams.
37. Both California and China have plans to move vast amounts of water from one part of the land to another. The primary reason that each feels water need to be moved is
38. Forcing saltwater through a membrane filter with extremely small pores to produce freshwater is called
39. According to water experts, the main cause of water waste is
40. The single biggest domestic water use in the U.S. is
41. A natural area that is prone to flooding is called a
Brendan Swanson