A number of companies nationwide are developing technology and techniques to meet the growing demand for rooftop gardening.
- Trenton Forging in Michigan is trying to come up with an energy-efficient way to warm a year-round greenhouse on its roof.
- Sky Vegetables wants to build hydroponic farms on roofs in major metropolitan cities.
- GreenGrid Roofs in Chicago sells a modular system of plastic bins that makes installing rooftop beds easier.
source: Google/The Associated Press
