DIY Wall Gardening
If you are more of a DIYer, you might build a unit like this one demonstrated by Dr. Sue Hamilton of the University of Tennessee Extension Service. Indoors you can use house plants to purify the air. Outdoors you can grow vegetables, save on water, and provide insulation for your house. Watch. It’s easy.
On page 3 see how to green any moderately sloping roof, making your home cooler in the summer and warmer in the winter.
Photo credit: jingdianjiaju