Solar power collapsed from about $100 per watt in the 1970s to roughly $0.20. That is a 500x cost revolution.

Solar power collapsed from about $100 per watt in the 1970s to roughly $0.20. That is a 500x cost revolution.

More from this video

See all →

Don't lose this one

A free account saves cards like this to your Collection, and Korva resurfaces them so you actually remember.