From sand to soil in 7 hours | Ole Morten Olesen | TEDxArendal
![](https://i.ytimg.com/vi/8Q1VnwcpW7E/mqdefault.jpg)
19:50
Humus - the essential ingredient: Graeme Sait at TEDxNoosa
![](https://i.ytimg.com/vi/HmD1kxll_G8/mqdefault.jpg)
10:04
First, heal the soil | Allen Williams | TEDxBoston
![](https://i.ytimg.com/vi/kSQm09twKEE/mqdefault.jpg)
12:20
How a rooftop farm feeds a city | Mohamed Hage | TEDxUdeM
![](https://i.ytimg.com/vi/_8l2egORXGA/mqdefault.jpg)
16:14
10 things I learned after losing a lot of money | Dorothée Loorbach | TEDxMünster
![](https://i.ytimg.com/vi/8vQGGcPojM4/mqdefault.jpg)
22:12
Why AI is a threat--and how to use it for good | John Tasioulas | TEDxAthens
![](https://i.ytimg.com/vi/VObLitSe3K0/mqdefault.jpg)
15:20
Soil -- from dirt to lifeline: Fred Kirschenmann at TEDxManhattan
![](https://i.ytimg.com/vi/6FuEkUiCtWQ/mqdefault.jpg)
15:24
Dirty secrets of healthy soil | Peter Rutherford | TEDxPittwater
![](https://i.ytimg.com/vi/I2xDZlpInik/mqdefault.jpg)
17:53