Low Tech Makes Cleaner Water in Iowa; So What’s Stopping It? https://ift.tt/SVxlH6p SLATER, Iowa (AP) — Nick Helland’s central Iowa farm looks much like every other nearby farm on this chilly March day, with corn stubble stretching from a gravel road up over a low hill to the northern horizon. But look closely, and you can see patches of muddy ground where a few months ago crews ...

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