More risks are created by chemicals and machinery. Farmers often work with some very dangerous chemicals, but they may have little training in how to use them safely. They may not take the necessary precautions to keep chemicals away from their skin or clothes. The poisons can even get into the water supply that farmers and their animals drink. Also, farmers use a great deal of equipment, such as tractors and chainsaws. Accidents with this machinery can cause a variety of injuries, or even death.