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There are lots of ecological reasons to buy local food, from reducing the carbon footprint of the meals you eat to preventing agribusiness' destruction of unique ecosystems like the Amazon rainforest.
But research published by Proceedings of the National Academy of Sciences Monday uncovered another surprising benefit to local agriculture: it is also better for the environment of countries that currently import lots of food.
This is because, when local crops are displaced by cheaper imports, farmland is then drafted into service growing less sustainable crops, with environmental consequences for the importing country.
The study pointed out that its findings go against conventional wisdom, which held that importing countries benefited from global food trade at the ecological expense of exporting countries.
"What is obvious is not always the whole truth," study author and Michigan State University (MSU) Center for Systems Integration and Sustainability Director Jianguo "Jack" Liu said in an MSU press release. "Unless a world is examined in a systemic, holistic way, environmental costs will be overlooked," she said.
To undertake that systemic examination, the study's authors looked at the international soybean trade.
As the Yale School of Forestry and Environmental Studies explained, Brazil is the world's second-largest producer of soybeans, and its efforts to clear land for that production is a "major driver of deforestation in the Amazon basin."
But the study found that the trade also hurt countries like China, which is the world's largest soybean importer.
As China imported more and more soybeans, local farmers could no longer compete and converted their fields to crops like corn and rice, which require more nutrients to grow and therefore result in an increase in Nitrogen pollution.
The study looked specifically at the highest-producing agricultural land in China, in the country's northeast, and found that the greatest increases in Nitrogen pollution there came from fields that had flipped from soy to rice, followed by fields that had flipped from soy to corn.
Researchers further examined 160 cases on six continents and found Nitrogen levels went up when fields in importing countries switched from soy to other, more demanding crops like wheat, vegetables, corn or rice.
The study's abstract concluded with a call for more research into the environmental consequences of international trade agreements for importing countries,
According to the MSU press release, another potential area of study would be fields in Mexico and South America that have switched from corn to more nutrient-demanding vegetables due to an influx in cheap corn from the U.S. The release noted that changes in crops can also put increased pressure on local water supplies.
"This study underscores the need to pay attention to both sides of international trade not rely on conventional wisdom," Liu said in the MSU press release.
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Tropical forests globally are being lost at a rate of 61,000 square miles a year. And despite conservation efforts, the global rate of loss is accelerating. In 2016 it reached a 15-year high, with 114,000 square miles cleared.
At the same time, many countries are pledging to restore large swaths of forests. The Bonn Challenge, a global initiative launched in 2011, calls for national commitments to restore 580,000 square miles of the world's deforested and degraded land by 2020. In 2014 the New York Declaration on Forests increased this goal to 1.35 million square miles, an area about twice the size of Alaska, by 2030.
By Cheryl Leahy
Do you think almond milk comes from a cow named Almond? Or that almonds lactate? The dairy industry thinks you do, and that's what it's telling the Food and Drug Administration (FDA).
For years, the dairy industry has been flexing its lobbying muscle, pressuring states and the federal government to restrict plant-based companies from using terms like "milk" on their labels, citing consumer confusion.
By Jeremy Deaton
A driver planning to make the trek from Denver to Salt Lake City can look forward to an eight-hour trip across some of the most beautiful parts of the country, long stretches with nary a town in sight. The fastest route would take her along I-80 through southern Wyoming. For 300 miles between Laramie and Evanston, she would see, according to a rough estimate, no fewer than 40 gas stations where she could fuel up her car. But if she were driving an electric vehicle, she would see just four charging stations where she could recharge her battery.
Fire Continues at Texas Petrochemical Plant as Company's History of Violations Gets Renewed Scrutiny
By Andrea Germanos
A petrochemical plant near Houston continued to burn for a second day on Monday, raising questions about the quality and safety of the air.
The Deer Park facility is owned by Intercontinental Terminals Company (ITC), which said the fire broke out at roughly 10:30 a.m. Sunday. Seven tanks are involved, the company said, and they contain naptha, xylene, "gas blend stocks" and "base oil."
"It's going to have to burn out at the tank," Ray Russell, communications officer for Channel Industries Mutual Aid, which is aiding the response effort, said at a news conference. It could take "probably two days" for that to happen, he added.
The hillsides dyed orange with poppies may look like something out of a dream, but for the Southern California town of Lake Elsinore, that dream quickly turned into a nightmare.
The town of 66,000 people was inundated with around 50,000 tourists coming to snap pictures of the golden poppies growing in Walker Canyon as part of a superbloom of wildfires caused by an unusually wet winter, BBC News reported. The visitors trampled flowers and caused hours of traffic, The Guardian reported.
A controversial pesticide test that would have resulted in the deaths of 36 beagles has been stopped, the Humane Society of the United States (HSUS) and the company behind the test announced Monday. The announcement comes less than a week after HSUS made the test public when it released the results of an investigation into animal testing at Charles River Laboratories in Michigan.
"We have immediately ended the study that was the subject of attention last week and will make every effort to rehome the animals that were part of the study," Corteva Agriscience, the agriculture division of DowDupont, said in a statement announcing its decision.