Warmer weather puts damper on Minnesota's maple syrup harvest

Maple syrup producer Dave Rogotzke collected sap in this pumphouse in 2013. From here, a vacuum suctioned the sap to a holding tank, where it was then fed through reverse-osmosis to remove much of the water, before it was finally boiled in a 14-foot evaporator to make maple syrup.
Dan Kraker | MPR News
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