This documentary combines economics, commodities, private equity and hedge funds, with industry and demographic trends. In other words this documentary looks at how a systematic rise in agricultural prices has made it a potentially profitable venture for investors with the capital and expertise to buy up large tracts of land in Africa and transform agricultural practices to global best practice. Of course there's always room for complications, conflict, and exploitation. These issues are important and worth noting and understanding, but the idea that advanced agricultural techniques be brought to Africa to improve crop yields should be a positive. There is certainly scope for this investment to positively impact on the local economy and to provide new opportunities for the locals - indeed partnerships promise mutual benefits - but this is not a given and probably requires a good policy and regulatory setting, as well as investors that approach it as a partnership and not just a way for a quick buck.
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Finance Documentaries: http://www.financedocumentaries.com/2013/04/land-rush.html