The third person to respond to Rentzhog’s tweet was We Mean Business co-founder Callum Grieve. Grieve responded to Greta with a personal message adding the hashtag #WeDontHaveTime. We Mean Business represents 477 investors with 34 trillion USD in assets. The founding partners of We Mean Business are BSR, CDP, Ceres, The B Team, The Climate Group, The Prince of Wales’s Corporate Leaders Group (CLG), and the WBCSD.