Food Vs Fuel Debate
In some poor countries the rising price of vegetable oil is causing problems. There are those that say using a food crop for fuel sets up competition between food in poor countries and fuel in rich countries. Some propose that fuel only be made from non-edible vegetable oils like jatropha oil. Others argue that the problem is more fundamental. The law of supply and demand predicts that if fewer farmers are producing food the price of food will rise. It may take some time, as farmers can take some time to change which things they are growing, but increasing demand for biofuels is likely to result in price increases for many kinds of food. Some have pointed out that there are poor farmers and poor countries making more money because of the higher price of vegetable oil.
With the use of non-edible vegetable oils produced by trees such as Millettia Pinnata (formerly Pongamia Pinnata) or the Moringa oleifera tree, both which grow on borderline or non-arable land, the food versus fuel debate becomes less of an either/or question.
Apart from their facility of growing in non-arable and/or marginal land, these trees offer major advantages over peanut, soy-bean, sunflower, etc., in that they have long lives (up to 100 years), very low maintenance (since the intensive husbandry is limited to the first few years of their producing lives) and can provide cash-crops to rural areas, such as rural India. In the case of Millettia Pinnata and a few others, the fact that they are nitrogen-fixing legumes is another very important factor, in that they do not deplete the soil.
Among other benefits of these trees is that they have root-systems that penetrate much deeper and do not compete with shallow-rooted plants, like grass (once the trees have attained a certain maturity). This means that the land can be used for multiple purposes, such as grazing for animals. Yet another benefit of using Millettia Pinnata to produce bio-diesel is that it can tolerate low rainfall (as little as 250 ml per year), far below what most food-crops require, thus reducing yet more their potential to compete.
Read more about this topic: Vegetable Oil Economy
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