Researchers have known for years that exposure to excessively-loud noise can cause changes in blood pressure as well as changes in sleep and digestive patterns -- all signs of stress on the human body. And the European Commission, which governs the European Union, considers living near an airport to be a risk factor for coronary heart disease and stroke.

Learn the health effects of airport noise and pollution, and what citizen's groups are trying to do about these problems.

_{Photo by Matt Teague}