30.08.2011 - Ozone seen as world crop threat

Ground ozone levels in the U.S. Midwest could reduce soybean yields by10 percent, costing more than $1 billion in lost crop production, U.S. scientists say. U.S. Department of Agriculture researchers say a five-year study using satellites and surface monitors found ozone levels above 50 parts per billion have caused damage to soybean crops in Iowa, Illinois and Indiana..............................................Full Article: Source

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