Cancer may spread to the head and neck from other parts of the body and cause oral pain. With some cancers, pain may be felt in parts of the body not near the cancer. This is called referred pain.
Soil erosion. If you define land pollution as irreversible damage to the land, you have to include soil erosion as a type of pollution too. Many people think soil is soil, always there, never changing, ever ready to grow whatever crops we choose to bury in it.
Land pollution is basically pollution of soil with materials like chemicals etc. because of to the medium in which it occurs: atmospheric pollution (see Air Pollution ... Antoine de Saint-Exupery (1990-1994)... There are various types of pollution like water pollution, air pollution, land pollution.