About 23% of the food produced for human consumption is traded internationally
"About 23% of the food produced for human consumption is traded internationally."
D’Odorico et al., “Feeding humanity through global food trade,” Earth's Future 2, no. 9 (September 2014): 458-469, accessed October 23, 2014, doi: 10.1002/2014EF000250, http://onlinelibrary.wiley.com/store/10.1002/2014EF000250/asset/eft242.p....