I was put onto this by Pete Beal of Mountains and Water via facebook. Whilst Pete had some issue with it I thought it an interesting talk. Whilst US based many of the issues are as relevant over here especially the average age of conservation groups. Fortunately we have the BMC and the Access and Conservation team that are doing a great job to promote access and responsible use of climbing areas.
What I thought staggering was the $100 billion climbing industry in the US and 4.1 million people who went sport climbing last year in the US.