From Ancient Sun to Siphosethu
History of Clean Energy
The big idea
We used clean energy BEFORE coal.
Coal is only 200 years old. Sun, wind and water powered humans for 5000 years.
Global timeline
- ~2000 BC
Sun is First Energy
Humans use sun to dry food, warm homes. Architecture designed for sun.
- 1839
Solar is Discovered
French scientist Becquerel discovers solar effect — sun can make electricity.
- 1883
First Solar Panel
Charles Fritts builds first rooftop solar panel in New York. Only 1% efficient.
1% efficient - 1970s
Oil Crisis Pushes Solar
World realizes oil can run out. First solar calculators and satellites.
- 2000s
Solar Becomes Affordable
Price drops 90%. China and Germany mass produce panels.
90% price drop