Food security is different in every place and yet impacts every society. Infrastructure, environmental conditions, and political stability can all have significant impacts on the production of food. Environmental events such as droughts and rising sea levels also impact existing food sources. Economic, legal, and social barriers may thwart access to available food. Political conflicts, for example, interrupt supply chains and divert food away from those in need. Even when there is enough food available, and people have access to it, their food security may be threatened by the safety of the food.