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Walmart has promised big cuts in emissions of greenhouse gases. To meet that goal, though, the giant retailer may have to persuade farmers to use less fertilizer. It won't be easy.
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Many farmers who grow corn and soybeans to feed livestock use too much nitrogen fertilizer, which can cause a host of environmental problems. To fix them, scientists say we should eat less meat.
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State agriculture officials say farmers should take caution when turning their drought-damaged corn into silage. Severe drought conditions have devastated…