Hong Kong innovators have won the top prize, eight special awards and 35 medals at a major international invention competition in Silicon Valley, with a solar-powered fertiliser production system claiming the event’s highest honour. The city’s delegation secured 22 gold and 13 silver medals at the Silicon Valley International Invention Festival (SVIIF), which concluded at the Santa Clara Convention Center in California on Sunday. Amonova’s regenerative, solar-powered air-to-fertiliser production...