The image above shows the harvesting of salt from the Cargill salt ponds on the southern end of Bonaire, WI.
There are just two employees - one operating the Caterpillar dozer and one driving the Caterpillar belly dump. The belly dump is filled to overflowing in just a few minutes. Much of this salt gets shipped by sea to the icy parts of North America for road de-icing.
The image below is a copy of a black and white photo (the original of which is in a museum on Bonaire - not sure of the date) showing two laborers using picks to break the salt crust on the same salt ponds, while a third laborer lifts the broken chunks of salt onto a wheel barrow.
All human energy - no Diesel fuel!
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