Hope it works out for them!
On the Snohomish River delta, there was an environmental cleanup a couple decades back, with an rainwater infiltration diversion system (membranes) to cap the polluted ground water. To discourage damage to the membranes from blackberries and other growth, they fenced the area and run a bunch of goats on it. To protect the goats from predators, they have a handful of llama’s also roaming around. It’s all described in the remediation plan. Appears to be working.
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