Video of an excellent summary about Natural Capital by Dieter Helm at Irish Natural Capital Forum October 2016 here.
I didn't attend myself, but the video records Professor Helm's 30-min talk and Q&A. Prof Helm is Chair of the UK's Natural Capital Committee.
Some wonderful soundbites, eg "No country in Europe currently has a Balance Sheet" (9mins 30). and "better to be roughly right than precisely wrong" (11 mins 45 to 12 mins 15).
Accountancy isn't just for business, it's for the environment" (About 20 mins).
The Planetary CFO - working towards a sustainable World Balance Sheet.