In this video from NOVA's Energy Lab, learn the basics of what energy is, how it is converted into other forms, and why we need new energy sources. Energy conversion is the process of changing one form of energy into another. Objects store energy (in chemical bonds or in an object's position, for example) that can be converted into other forms (such as heat, light, and electrical energy). Energy transformations are not always efficient or practical, and they may produce less useful forms of energy. Modern lifestyles rely on energy conversions, and we will continue to need new sources of energy in the future.

This video is available in both English and Spanish audio, along with corresponding closed captions.