A secondary goal is to ensure a resource base for continued marine harvesting. Sustainability is squeezed from multiple directions: the degradation of the resource base, a lack of global-scale governance of the drivers of ocean acidification and warming, and a lack of rational local and regional governance of drivers/subsidies for marine resource use.
ROW, BRISE, and China will continue facing huge challenges on the local scale, as well as global challenges with acidification, and so receive a red rating. USA and OECD will solve many of the local challenges with continued global warming, but remain vulnerable to acidification and global fishery challenges, and hence receive a yellow rating. Uncertainty is high on various factors, except acidification that has low uncertainty.
Understanding the score
Five regions: USA, OECD (excl. USA), China, BRISE (Brazil, Russia, India, South Africa and 10 other emerging economies), ROW (rest of the world).
Green light: Goal likely to be reached.
Orange light: Goal not likely to be reached, but more than 50% of the gap between today's status and the goal is likely to be closed.
Red light: Goal not likely to be reached, and less than 50% of the gap between today's status and the goal is likely to be closed.