A Pyrotechnic History Of Humanity - Agriculture: The solar energy revolution - ÃÛÑ¿´«Ã½ Sounds

A Pyrotechnic History Of Humanity - Agriculture: The solar energy revolution - ÃÛÑ¿´«Ã½ Sounds
Agriculture: The solar energy revolution
Justin Rowlatt looks at the energy revolutions that drove human history.