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 ...

This transcript was prepared by a transcription service. This version may not be in its final form and may be updated. Annie Minoff: Graham Alexander has been working in solar energy for a long time.

Forbes contributors publish independent expert analyses and insights. Dianne Plummer is an Energy Consultant and Certified Energy Manager. As the world races to combat climate change, the debate over ...