Support WBURHere's what happened on day 4 of the U.N.'s COP27 climate talksRebecca HersherMichael CopleyLauren SommerNovember 09, 2022 ShareFormer US Vice President Al Gore speaks during the TRACE Greenhouse Gas Inventory launch at the plenary hall during the 2022 United Nations Climate Change Conference COP27. (dpa/Picture Alliance via Getty)
