This topic investigates the evolution of the thought of man-land relationship. During the primitive hunting and gathering civilization period, due to the low level of productivity, people were in a passive position in the relationship between man and land, which was greatly restricted by the land and had little impact on the land. So, A is wrong. During the period of agricultural civilization, the improvement of agricultural production technology expanded the scope of agricultural planting. Due to unreasonable farming, irrigation and grazing, the local ecological environment has been destroyed. So, B is wrong. Since the industrial revolution in18th century, the "three wastes" discharged in industrial production and the harmful substances such as fertilizers and pesticides applied in agriculture have caused serious pollution and destruction to the environment. It can be said that the resource and environment problems of the man-land system at this stage are not local, but global. So, c is wrong. Since modern times, especially since the 1970s, human beings have gradually realized the seriousness of environmental problems, and this understanding has gradually become systematic and scientific.