Paraguay is the world’s fourth biggest exporter of soya, a crop that has been dubbed “green gold.” Its harvest – likely to reach a record 9 million tonnes this season – is mostly shipped as raw soybeans to the European Union, where it is used in cattle feed, or to Argentina for the manufacture of biofuels. More than three million hectares of soybean are currently sown in Paraguay, nearly triple the area than in 1998, and agricultural exports will account for the majority of the country’s predicted…