| http://www.w3.org/ns/prov#value | - As the acreage used to produce the feedstocks for biofuels production is scaled up, great care will be required to ensure that not only are dependable feedstock supplies delivered to biorefineries, but also to avoid disruption of existing food, feed, and fiber markets, and to protect our natural resources base upon which we depend for clean air, water, and other critical ecosystem services.
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