A trend is emerging that make people sit back and think some.
Many firms and some states are now renting or acquiring farmland in countries away from home, and starting to do agriculture the way they do it at home, i.e. in a very modern way with GM seeds with resistances built in and high yields, the best equipment and even their own people.
This is a fairly recent phenomenon and lately it has attracted some attention. Local people are starving in some of these places, farmers don´t like being pushed away, methods have been criticized, there is doubt where the money goes, food markets are disrupted.
Examples are Madagascar where South Korea have come in (causing the overthrow of the president), Ethiopia where India, Saudi Arabia have interests, Kina in Angola etc.
Food security for the locals is also an issue. Legal systems in some countries are such that the ownership of land is a common good. Some nomads are also hurt when large areas are put to these uses.
Water is often an additional issue as farming needs lots of water.