From sand to soil in 7 hours | Ole Morten Olesen | TEDxArendal
18:19
How to travel the world with almost no money | Tomislav Perko | TEDxTUHH
10:34
Biochar - the future of sustainable agriculture: Lauren Hale at TEDxUCR
12:20
How a rooftop farm feeds a city | Mohamed Hage | TEDxUdeM
17:05
Cows, Carbon and Climate | Joel Salatin | TEDxCharlottesville
17:53
Planting the Rain to Grow Abundance | Brad Lancaster | TEDxTucson
10:04
First, heal the soil | Allen Williams | TEDxBoston
20:29
Why I changed my mind about nuclear power | Michael Shellenberger | TEDxBerlin
15:55