This picture taken on May 9, 2026 shows Japanese product designer and engineer Satoshi Nakagawa taking part in an interview with AFP at the "Ku-An" test lab in Hitachi-ota, Ibaraki Prefecture. Glinting in the night halfway up a hill in Japan, the greenhouse-like "Ku-An" test lab is lit up by electricity harnessed from 1,500 wooden boxes of soil and compost. Designer Satoshi Nakagawa has long battled sceptics, but believes that the technology powering the 800 LEDs has a role to play in solving humanity's energy conundrum. (Photo by Philip FONG / AFP via Getty Images) / To go with AFP story Japan-climate-electricity-technology, FEATURE by Hiroshi Hiyama