U.S. Special Presidential Envoy for Climate John Kerry participates in an event on women's role in building a climate-resilient world, at COP28 World Climate Summit, in Dubai, United Arab Emirates, December 4, 2023. REUTERS/Amr Alfiky/File Photo Acquire Licensing Rights DUBAI, Dec 5 (Reuters) - U.S. special climate envoy John Kerry on Tuesday launched an international engagement plan to boost nuclear fusion, saying the emissions-free technology could become a vital tool in the fight against climate change. Kerry said the plan involved 35 nations and would focus on research and development, supply chain issues, and regulation, and safety. "There is potential...