A bit like Gillian Ayres whos says she paints because «One can't bloody help it», nice little video of her here saying that and other things too. (patternsthatconnext.wordpress.com)
Here is a little more about the work and objectives of the Rainforest Alliance and a nice little video which sums up the work they do. (teapigs.com)
If you want to get more in - depth explanation, you can read about the difference between sweet potatoes and yams here (spoiler alert — they really are completely different species, but what we have in U.S. are all sweet potatoes — just labeled wrongfully as «yams»), or watch a nice little video here. (viktoriastable.com)