According to a proposed climate plan, South Africa plans to cut emissions by about a third by 2030.

"There is a lot of politics and corporate interests in the coal industry. Winkler continues, "The term' coal mafia' is often used to describe opaque buying contracts."

Meanwhile, earlier this month, a fifth procurement round for 1,600 MW of onshore wind and 1,000 MW of solar energy was announced - two years later than anticipated.

South Africa is suffering intermittent power losses, which Eskom predicts could continue for the next five years due to delayed solar expansion and aging coal power plants being gradually taken offline for maintenance.

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