By Ben Aris In Samarkand The numbers simply don’t add up. Hydrogen has been hailed as the saviour of the climate, but hard to make, difficult to transport and inefficient to use, the gas is not a panacea for the Climate Crisis. Scientists estimate that 390mn tonnes of hydrogen will be required annually worldwide by 2050 to power the world, but today a total of only about 2.5mn tonnes is being produced worldwide and investors are shying away from the business. Under Europe’s REPowerEU plan, some 10mn tonnes per year of green hydrogen needs to be produced by 2030, and another 10mn tpy will have …