This film created by the James Hutton Institute and GRID-Arendal helps to explain Payment for Ecosystem Services (PES) schemes. It has been produced as part of the James Hutton Institute - UNESCO Global Dialogue on Water Ecosystem Services [1].
Links:
[1] http://www.hutton.ac.uk/UNESCOdialogue
[2] https://www.hutton.ac.uk/research/archive/2011-16/managing-catchments-and-coasts/ecosystem-services/pes