Whittled by a half million years of wind and rain, the haunting claystone hills and buttes of Badlands National Park rise above the surrounding sea of grasslands.

历经了50万年的风吹雨打后，恶国家公园的黏陵与孤山矗立在一片草之海中。

As a whole the variation trend was that the area of cultivated land, forest, town (city) was increased greatly, the water area was enlarged, but the grassland and badland was decreased.

总体变化趋势是、及城镇面积大幅度增加，水域面积亦有增长，但草和荒面积减少。