Outdoor, Raised Planters, Grass, Back Yard, Gardens, Garden, and Walkways You don’t need to have a complicated harvesting tank built if you want to conserve water. A simpler way is to place a rain barrel—found at your local home and garden supply store—under the downspout on your roof to collect rainwater for gardening. Invest in a good water filtration or treatment system, and you can even use your rainwater for bathing, laundry, cooking, and drinking.  Photo 5 of 10 in 9 Effective Ways to Bring Sustainable Design Into the Home from The First Wave

9 Effective Ways to Bring Sustainable Design Into the Home

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In the garden, Mary Henning gives her potted plants a much-needed drink of graywater diverted from the kitchen and bathrooms and filtered by a massive green wall.