The most significant behavioral risk factors for heart disease and stroke are unhealthy diets, low levels of physical activity, tobacco use, and harmful alcohol consumption. One of the major environmental factors is air pollution. The effects of behavioral risk factors can manifest as high blood pressure, elevated blood glucose or lipid levels, overweight, or obesity. These “intermediate risk factors” can be detected at the primary healthcare level and indicate an increased risk of heart attack, stroke, heart failure, and other complications.