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President Trump has signed an executive order overturning some measures put in place by his predecessor, Barack Obama, to curb global warming. He said the order, which will roll back environmental protections, represented "an end to the war on coal".

Also in the programme: UN urges Iraqi forces and US-led coalition to reduce civilian casualties in fight against Islamic State group and top Chinese university demands that students learn to swim.

(Photo: Surrounded by miners, President Trump signs the Energy Independence Executive Order. Credit: AFP/Getty Images.)