A technological revolution has transformed the ancient tradition of sugar making—with big implications for local economies ...

oil-fueled evaporators and filter presses that turn the sap from 15,000 maple trees into syrup shipped around the world.

4. Depending on the sap’s sugar content, which varies by maple tree variety, you’ll need about 43 gallons of sap to produce one gallon of syrup. 4. Hang buckets to collect the sap for boiling down. 5.