Which statement closely describes how much land in the United States has been significantly modified by human activities, including urban or suburban development or agriculture of all forms?

On average, how many acres of land are being converted to urban uses annually in the United States?

Human actions have directly modified how much of the planet's land surface?

Read this excerpt from Alan Weisman's "The City Without Us":The mature beech-oak-ash-ailanthus forest will be mowed down [by glaciers]. The four giant mounds of entombed garbage at the Fresh Kills landfill on Staten Island will be flattened, their vast accumulation of stubborn PVC plastic and of one of the most durable human creations of all—glass—ground to powder.Which claim does the excerpt most clearly support?A.The human impact on the environment is permanent.B.Nature acts swiftly to reclaim abandoned urban areas.C.Nature is ultimately more powerful than humans.D.Without humanity's presence, New York City would quickly deteriorate.SUBMITarrow_backPREVIOUS

Read the following passage to answer Questions 15 to 17Erosion of America's farmland by wind and water has been a problem since settlers first put theprairies and grasslands under the plow in the nineteenth century. By the 1930s, more than 282 millionacres of farmland were damaged by erosion. After 40 years of conservation efforts, soil erosion hasaccelerated due to new demands placed on the land by heavy crop production. In the years ahead,soil erosion and the pollution problems it causes are likely to replace petroleum scarcity as thenation's most critical natural resource problem.15. Today, soil erosion in America ___.A. causes humans to place new demands on the land.B. is worse than it was in the nineteenth century.C. happens so slowly that it is hardly noticed.D. is the most critical problem that the nation faces.E. is worse in areas which have a lot of petroleum production.16. The author points out that erosion in America ___.A. has damaged 282 million acres ever since settlers first put the prairies and grasslands under theplough.B. has been so severe that it has forced people to abandon Settlements.C. occurs only in areas with no vegetation.D. can become a more serious problem in the future.E. was on the decline before 1930s.17. It is pointed out that in America ___.A. petroleum is causing heavy soil erosion and pollution problems.B. heavy crop production is necessary to meet the demands and to prevent a disaster.C. soil erosion has been hastened due to the overuse of farming lands.D. water is undoubtedly the largest cause of erosion.E. there are many ways to reduce erosion.Year

Which of these actions by humans adds to pollution levels?Group of answer choicesReusing old itemsGrowing more plants in citiesTaking care of forestsUsing things made by people and from nature