1 Allergic reactions and sensitivities to certain foods may cause a canker sore to develop. Allergic reaction to certain types of bacteria found in the mouth may also result in this type of mouth ulcer.  Celiac disease sufferers may experience canker sores.
One of the biggest sources is called nonpoint source pollution, which occurs as a result of runoff. Nonpoint source pollution includes many small sources, like septic tanks, cars, trucks, and boats, plus larger sources, such as farms, livestock ranches, and timber harvest areas.ne of the biggest sources is called nonpoint source pollution, which occurs as a result of runoff. Nonpoint source pollution includes many small sources, like septic tanks, cars, trucks, and boats, plus larger sources, such as farms, livestock ranches, and timber harvest areas.
Fact 40: Cruise ships are also a major source of water pollution. They produce over 200,000 gallons of sewage which is mostly released in the ocean. Apart form that, they are also causing at least 35,000 gallons of water contamination due to oil spill.act 6: 20% of the groundwater in China is used as drinking water which is highly contaminated with carcinogenic chemicals which cause high levels of water pollution. Fact 7: Fourteen billion pounds of garbage mostly plastic, is dumped into the ocean every year.