South Korean president Moon Jae-in has announced <http://english1.president.go.kr/korea/korea.php?srh%5Bview_mode%5D=detail&srh%5Bseq%5D=431> that the country will begin to phase out its nuclear-energy programme. South Korea has 25 reactors that generate around a third of the country's electricity, and in a speech yesterday at an event to mark the closure of the Kori-1 nuclear power plant, he declared that no new reactors would be built and existing units will not operate beyond 40 years. Moon says that the country would now focus on developing renewable sources of energy. "An era of clean energy that puts first the safety of the people is what our energy policies must pursue," he notes. Kori-1, which came online in 1978, is the country's oldest nuclear power plant and will now be decommissioned – the first South Korean nuclear power unit to do so.