The guerrillas have perfected the production of these mines using household items like PVC piping and syringes with the rubber taken out, which act as plungers.
BBC: Farc rebels have been fighting the government for decades
For example, contaminant removal may include the separation of unwanted materials like electronics, PVC and minerals.
FORBES: Coming Soon: Intelligent Recycling Robots
Mr. VERRALL: I like it. (unintelligible) actually the guy in 1985 was actually the four-inc PVC filled with sand.
NPR: Vegetable Gardening On A Budget
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