Greenhouses are amazing. One of the top agricultural exporters in the world is the Netherlands. That shocked me when I discovered it. Part of the reason is fertile soil and dependable rain. But a huge component of how they can do so much with so little land is greenhouses.

It seems like something we could stand to invest a lot more in as a global civilization. An understated benefit is making the food supply more robust to volcanoes, asteroids, and nuclear winters.