A recent study warns that “future crops will face threats… from the massive expansion of cities… By 2030, it’s estimated that urban areas will triple in size, expanding into cropland and undermining the productivity of agricultural systems that are already stressed… Roughly 60% of the world’s cropland lies on the outskirts of cities—and that’s particularly worrying, the report authors say, because this peripheral habitat is, on average, also twice as productive as land elsewhere on the globe” (