Relatedly, Canada has started to outcompete southern US states at tomato production through a massive use of greenhouses. http://www.npr.org/sections/thesalt/2

Relatedly, Canada has started to outcompete southern US states at tomato production through a massive use of greenhouses. http://www.npr.org/sections/thesalt/2016/06/16/473526920/how-canada-became-a-greenhouse-superpower http://www.npr.org/sections/thesalt/2016/06/16/473526920/how... It's economical, unlike banana production in Iceland.