👉 In the context of natural resources, a non-tributary source is one that does not contribute to the total amount of natural resources. In other words, it is not an input to the production or consumption of these resources. For example, a lake can be considered a non-tributary source if it provides water for the ecosystem and supports aquatic life, but it does not generate any energy from sunlight or other forms of energy. Similarly, a stream that flows through a forest canopy is
