Now that we've created these monocultures that only grow a few varieties of each crop, if something happens to just one of those varieties, it can have a dramatic impact upon our food supply.
Ahora que hemos creado monocultivos que solo producen unas pocas  variedades por cosecha, si algo le pasa a alguna de esas variedades, puede tener un gran impacto en el suministro alimentario.