The new green superpower? Oil giant Kazakhstan tries to wean itself off the black stuff

Kazakhstan is rich with oil, gas and coal but Nursultan Nazarbayev, its president for life, has committed the country to a dramatic shift from fossil fuels to green energy. Is this huge nation, which is beset by rural poverty, major infrastructure challenges and environmental crises, able to realise his vision? Phoebe Greenwood travels to the Kazakh capital, Astana, and the Aral Sea region