Co-products are secondary products that are generated during the production of a primary product. For example, in the process of making biofuels from corn, the leftover material can be used to create animal feed. This allows for more efficient use of resources and reduces waste. In many industries, co-products can add value and create additional revenue streams. For instance, in the food industry, the pulp from juice extraction can be repurposed into snacks or baking ingredients. This practice not only benefits producers economically but also promotes sustainability by minimizing byproducts.