Andrew Steer, Special Envoy for Climate Change; Lucia Grenna, Connect4Climate Program Manager; and Angus Friday, Senior International Climate Policy Specialist;  will be joining The Climate Group and Connect4Climate from the World Bank at 4pm GMT, May 29 to answer your questions around the topic title, 'Harnessing collective intelligence for a Clean Revolution', live on Twitter. Read their biographies below and plan your questions now.

South Africa-based Greenpop, a social enterprise that runs urban greening and reforestation projects in sub-Saharan Africa, is on a mission to plant 5000 trees in Zambia.