https://www.wired.com/story/app-lets-farmers-monitor-crops-from-the-sky/

Climate change is the most horrific threat our species has ever known: No matter how powerful you are or how much money you have, our transforming planet is a reckoning for every one of us. But there are degrees to this misery. If you’re perched in a Manhattan penthouse, the effects might not be immediately apparent (because you don’t care or aren’t paying attention, or both). If you’re a subsistence farmer in Kenya, the situation is already much more dire.

There’s an equalizer, though, that is helping small farmers adapt to a changing planet: smartphones. More specifically, an app called PlantVillage—point your phone at a diseased plant, and artificial intelligence will analyze the leaves and tell you exactly what’s gone awry, so you can appropriately treat the problem. And now, in addition to that detective work, it’s gaining new powers thanks to eyes in the sky. Using free satellite data from the UN, PlantVillage can monitor biomass on a plot of land, giving small-scale farmers insight into how their crops are developing.