re-processing into new food products. This can also include measures to overcome current hinders that limits the food potential per produced unit of food, such as unharvested "ugly" vegetables at farms, "best-before" dates at retail level, or under utilized by-products from food processing. Via source reduction, by either recovering food resources for human consumption or preventing waste generation, the food potential can be increased. A higher food potential can support self-sustainability and self-sufficiency, which in turn can infer both environmental, economic and social benefits. The Flashfood app, designed by Josh Domingues, is being used in Canada and the United States to keep edible food from becoming waste. It notifies users of deeply discounted groceries, encouraging shoppers to buy soon-to-be-remaindered foods. They can make their purchase online, then go by the store to pick up their food. Initially focusing on restaurants and bakeries, the Too Good to Go app enables customers to buy discounted Surprise Bags of food. Too Good to Go was first used in Denmark in 2015 and was in use in 15 countries as of 2022. Human consumption Organizations can donate both non-perishable and unspoiled perishable food at the end of its shelf life to food banks, food pantries, food rescue programs, homeless shelters, and other organizations that redistribute food. Individuals who practice food rescue are sometimes referred to as freegans or dumpster divers. Feeding animals Many animals can eat food scraps. However, with animals as well as humans, spoiled or contaminated foods may cause illness. As described in a standard for animal care: "Food must be fresh, palatable, uncontaminated with biological or chemical agents, and nutritionally adequate for the intended species." Some farmers, solid waste collectors and recycling centers collect discarded food for use by animals. Local laws for the collection and use of such foods will vary. Industrial uses Anaerobic digestion is a conversion process that converts food waste and other types of organic waste into renewable energy. Food is separated from any packaging before being broken down into a more digestible state and mixed with bacteria in oxygen free holding tanks known as digesters. The bacteria work to break down the waste converting it into methane biogas which can be used to generate electricity. Hydrothermal liquefaction is the process of heating food waste under high pressure, converting the food waste into an oil that can then be refined into fuel. Once the initial liquefaction is