The amount of solar energy that strikes the surface of the Earth in one hour is more than enough to supply every person on the planet with electricity for an entire year. However, there are limits that prevent us from being able to fully take advantage of this energy.

Play the Energy Lab: http://www.pbs.org/wgbh/nova/labs/lab/energy/

Find discussion questions for this video and other resources in the Energy Lab collection on PBS LearningMedia: http://www.pbslearningmedia.org/resource/nvel.sci.tech.solar/solar-power/