A natural resource is defined as a form of energy and/or matter which is essential for the functioning of organisms, populations and ecosystems. In the case of humans, a natural resource, in his words ...

The world still depends heavily on coal, oil and natural gas to meet its energy needs. However, the use of these energy sources has a drastic impact on the environment. Furthermore, fossil fuels are ...

Renewable energy use in the U.S. has doubled in the past decade, with state-level contributions varying. Some states produce over half their electricity from renewables, targeting 100% clean energy ...