Iran has started rolling blackouts, local media reported on Sunday, which officials blamed on heat, drought impacting hydropower generation, and surging electricity demand blamed in part on crypto-currency mining. Power cuts in the peak summer months are not uncommon in Iran, but a government report this month said precipitation was down 43 percent compared to the country’s long-term average, warning of reduced water supplies for the year. Tehran and several other cities have been hit by unannounced power cuts that sparked complaints from consumers, disrupted businesses and damaged household a…

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