How does human activity change the surface of the land?

1. Large areas of land are being drained. If for carrying out landscape work it is necessary to get rid of a river or lake, then complex work is carried out for this, as a result of which not a trace remains of the water body.
2. Because of global warming, the area that until recently was land is flooded with water. Because of this, entire cities go under water.
3. Artificial ravines are being created. For example, during the extraction of chalk, it is impossible to do without extensive changes in the relief. Without them, this substance cannot be obtained.