I can't remember who posted on here 'The Soil Matters' but now I am hooked loads of interesting people on this show. Haven't actually got round to watching this one but it Dr James White so I can tell it will be interesting.

https://m.youtube.com/watch?v=l210-UuJitQ&pp=ygUUSXRzIHRoZSBiaW9sb2d5IHNvaWw%3D