Alexander Von Humboldt warned of harmful human induced climate change over 200 years ago. Roland Pease talks to Andrea Wulf about this remarkable lost hero of science. Show more
Discover 11,128,835 listings and 282,910 playable programmes from the BBC
Alexander Von Humboldt warned of harmful human induced climate change over 200 years ago. Roland Pease talks to Andrea Wulf about this remarkable lost hero of science. Show more