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In an unexpected development the world's two biggest CO2 emitters - the United States and China - say they will work together to achieve the target temperature goal of 1.5 Celsius. We'll speak to our environment correspondent in this hour to find out what the reaction has been to this news. Poland has accused Belarus of committing what it says is "terrorism" by escalating a border row between the two countries as thousands of migrants remain stuck at the border in freezing weather. And a US judge has approved a settlement of $626m to the victims of Flint Michigan in one of America's worst public health cases; we'll hear from the doctor who helped bring the problem to light.