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As the world's population rises, food prices slowly follow the trend. It's a fairly simple equation: more people require more food, but also take up more space and this limits the land available for farming. Some of the worlds largest food producing companies have therefore been looking into new ways to boost their production whilst keeping prices competitive. This has taken two forms; improve production from current land, and move into new markets where space is more free (and labor usually cheaper). Two of the main exponents of this are Pepsi Co (who oversee such brands as Tropicana, Scotts Porridge Oats and Doritos) and Nestle (who own hundreds of cereal, ice cream, yoghurt and chocolate brands), as they require vast amounts of naturally produced products to run their businesses. Both of them have started interesting projects aimed at combating these problems: