COP31: UN chief, US mayors, Greta and Lula crowds

From the UN chief slamming fossil fuels to American mayors showing up in place of the US administration and cheering crowds for Brazilian President Luiz Inacio Lula da Silva, here's what's happened Thursday at the COP31 summit.

COP31: UN chief, US mayors, Greta and Lula crowds

From the UN chief slamming fossil fuels to American mayors showing up in place of the US administration and cheering crowds for Brazilian President Luiz Inacio Lula da Silva, here's what's happened Thursday at the COP31 summit.