One such success story in the report is the removal of Edwards Dam on the Kennebec River in Maine.

CNN: Study opens floodgates on dam removal

Police say Mr Knight, 47, treated a nearby camp for disabled children and adults like a "local Walmart", pillaging it for supplies when needed, the Kennebec Journal newspaper reported.

BBC: Maine 'North Pond Hermit ' Christopher Knight held

In 1999, the ASF led the effort to tear down the Edwards Dam on the Kennebec River in Maine, which freed up 17 miles of river that had been submerged.

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