Having been filled, drained, converted to farmland, or lost due to coastal erosion, the loss of worldwide has been extensive.Need help? Review these concept resources.

Having been filled, drained, converted to farmland, or lost due to coastal erosion, the loss of worldwide has been extensive.

Erosion of Americas farmland by wind and water has been a problem since settlers first put the prairies and grasslands under the plow in the nineteenth century By the 1930s, more than 282 million acres of farmland were damaged by erosion. After 40 years of conservation efforts, soil erosion has accelerated 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 the nation's most critical natural resource problem. The author points out in the passage that erosion in America ________a.occurs only in areas with no vegetationb.can become a more serious problem in the futurec.has damaged 282 million acres ever since settlers first put the prairies and grasslands under the plowd.has been so severe that it has forced people to abandon their settlements

30 ways of improving a degraded communual land

Read the following passage:Each day, hundreds of animals lose their habitat as trees are cut down. Every year, our planet loses an area of forest the size of Panama. When once-fertile soils have been exposed to sun and wind for several years, they turn to desert.Which statement best describes the main idea of this passage?A.There will be serious short- and long-term consequences if deforestation continues at present rates.B.If humans don't create alternative habitats for wildlife, we face the extinction of many species.C.Deforestation causes endangered animals to move closer to human settlements, which is dangerous for animals and people.D.Although an area the size of Panama may not sound large, it is large enough to affect global landscapes.SUBMITarrow_backPREVIOUS

suggest two local and two national consequences of the problem of change in land and sea usage which poses a threat to biodiversity.