As it turned out, it wasn't World War III which would ravage the land, as people had feared in years prior. World War III was surprisingly short and sweet, nothing more than an empty barn blown to debris. The only missile fired had been the one to end the war, out of the fear of what chain of events might unfold. No, it was World War IV that had caused such massive desolation to the earth. Crops could no longer push forth from the soil and foliate. The world faced an oxygen shortage, and for the first time in decades, scientists were allowed to once more research and design. The answer to the problem was aero-farming. Devices that served as air-born greenhouses were launched into the sky, to better receive the nurturing sun. The land began to heal.