Cannabis can clean toxic mines and industries - Cannabis is dubbed the ‘mop crop’ for its ability to remove or render industrial pollutants harmless
She cites Randfontein’s Robinson Lake uranium levels that are 40 000 times above normally occurring rates.
Cannabis also sequesters 22 tons of carbon dioxide per hectare, a feat outpacing any forest or commercial crop. Campbell cultivated nearly 1 000 mine dump cannabis plants replicated under laboratory conditions that grew unimpeded in soils collected from heavy metal contaminated mining lands. Cannabis’s hyper-accumulator reputation was forged cleansing heavy metals from Chernobyl’s nuclear fall-out zone in the 1990s.
The technique was adopted in India to neutralise Rawalpindi’s textile mills’ heavy metal contamination and was considered after Japan’s 2011 Fukushima nuclear meltdown, but US-imposed cannabis prohibition laws were too onerous to navigate., a world leader in the recovery of gold from the retreatment of surface tailings, recycles primarily “historic” Gauteng mine dumps for profit using proven water hydraulic methods “with strict water-circuit management protocols”.
Heavy metals in “tailing dams … are inert” and “mostly” at concentrations subscribing to the minimum standard deemed safe for human consumption according to national water standards, said Kamau.
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