epa10342221 Britain's William, Prince of Wales (C) and Catherine, Princess of Wales (R) visit Greentown Labs, which bills itself as the world's largest climate technology startup incubator, in Somerville, Massachusetts, USA, 01 December 2022. The Prince and Princess of Wales will attend the Earthshot Prize Awards Ceremony in Boston on 02 December, according to the Royal Household. EPA-EFE/ANGELA WEISS / POOL