Ocean Literacy Principle #6: http://oceanliteracy.wp2.coexploration.org/ocean-literacy-framework/principle-6-v2/
Underlying System Dynamics model of tourism adapted from the generic, normalised Simulation Models Z411 and Z412B, in Bossel, H. 2007. System Zoo 2 Simulation Models: Climate, Ecosystems, Resources, BoD–Books on Demand.
Model simulation uses sd.js, an Open Source library for fast, in-browser simulation. https://github.com/sdlabs/sd.js