With one hand, breeder Sebastian Saura holds the head of a sheep, and with the other, in a matter of minutes, he shears the animal down to its tender pink skin. It is the first phase of a trip that will take wool from Uruguay — one of the world’s top exporters of textile fibre — to Germany for use in the seats of luxury cars. At this farm in central Uruguay, 17 workers spend three days shearing 2,600 sheep. They do it in the southern hemisphere’s springtime, before the summer heat sets…