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More and more, farmers are managing pests with biopesticides, natural combatants that come from sources like bugs, plants, and bacteria. In the 1970s a... More More and more, farmers are managing pests with biopesticides, natural combatants that come from sources like bugs, plants, and bacteria. In the 1970s and '80s, scientists used a parasitic wasp from South America to manage a mealy bug infestation threatening Africa’s important cassava crop. 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 19 hrs ago, Duration 1:54, Views 221
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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.