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Many of the serious health concerns in modern America can be linked to poor diet. People who regularly consume foods high in sodium, sugar and saturated fats not only increase their changes of obesity, but also increase their risks of developing heart disease, hypertension, diabetes, and several types of cancer. Although some people who regularly consume unhealthy foods do so knowingly, there is also a significant portion of the population that remains undereducated about proper nutrition. What is more, individuals who live in food deserts - areas in low-income neighbourhoods that lack easy access to healthy, affordable food may not even have the opportunity to obtain nutritious food. Although there have been some recent goverment efforts to reduce the number of food deserts, more community-based efforts should be encouraged and supported. Food deserts are located in high-poverty areas, such as sparsely populated rural areas or densely populated, low-income urban centers. Food deserts most often develop when major supermarket chains eithers relocate out of these areas or simply refrain from building stores there in the first place. Major food retailar chains tend to limit their store locations to wealthier urban or suburban neighbourhoods. Furthermore, fast food restaurants are disproportionately concentrated in low-income areas; recent estimates suggest that those living in the poorest areas of a city experience 2.5 times more exposure to fast food restaurant than the weathiest inhabitants of the city. Because individuals who live in food deserts tend of get their meals from fast food restaurants or convenience stores, they often suffer from a variety of health issues. Research has found that individuals who live in low-income neighborhoods are much more likely to develop problems with obesity, diabetes and hypertension than those who live in more affluent neighbourhoods.