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Retailers have been increasingly providing recycling bins in shops so the devices can be disposed of properly.

If these aren't not disposed of properly, they can leak toxic compounds such as cobalt and copper.

Last year, authorities introduced a rule requiring climbers to clear up their own poo and bring it back to base camp to be disposed of.

Ms Patterson's defence team says it was a "terrible accident", and that she lied to police and disposed of evidence because she "panicked" after unintentionally serving poison to family members she loved.

Speaking on Monday at an agricultural exhibition in the Free State province, Ramaphosa said the Afrikaners were moving to the US because they were not "favourably disposed" to efforts aimed at addressing the country's challenges.