Standing in a field of apple trees in Catalonia, fruit and cereal farmer Ramón Falguera looks worried. Last year, fruit harvests dropped by around a third and wheat by half due to a lack of rain and restrictions on water use in this area of northeast Spain. The water canal used for irrigating the farmland, which stems from rivers born in the Pyrenees mountains, only opened for a month last spring for the first time since it was built 160 years ago. The drought is thought to be the worst in 200 years, hitting large swathes of the region following more than three years of low rainfall and record…