After weighing all those risks, he decided to bet the farm on avocados. These trees are no climate savior — far from it. But Sayer been experimenting with them for decades and understands how they work. He knows he can sell avocados, because he’s tapped into a network that reserves spots for the fruit in every grocery store, and turns sunburned avocados into frozen guacamole. Also, you might have noticed the market is strong: Americans are chowing down so much avocado tonnage in new, creative ways — smoothies, toast, ice cream, you name it — that consumption has increased sevenfold since 2000.