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Worldwide biofuel production has increased, with the main source being corn-based ethanol. This has driven up corn prices in the U.S. (a large producer... More Worldwide biofuel production has increased, with the main source being corn-based ethanol. This has driven up corn prices in the U.S. (a large producer) and created problems for countries that heavily rely on U.S. corn imports, such as Mexico. In 2007, tortilla prices soared 70 percent in that country, and riots broke out. Eventually the government stepped in to control costs, but similar situations could arise in the coming years as we increasingly turn to food as a source of fuel. By 2050 we'll need to feed two billion more people. Click here for a special eight-month series exploring how we can do that—without overwhelming the planet: http://food.nationalgeographic.com. Watch more Food by the Numbers videos: http://www.nationalgeographic.com/foodbynumbers/
Date 14-09-26, Duration 1:47, Views 498
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When is the best season to travel?
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- Winter — I love to escape the cold.
- Summer — it's a great time to take a break from working/studying.
- Fall — tourist destinations are less crowded and scenery can be breathtaking.
- Spring — after the cold winter months, it's a great time to get away.