Washington D.C. is one of my favorite cities to visit, with its countless museums , attractive riverside walks and great restaurants. Also I am always impressed by the way the city looks after its trees. Now QR Codes are helping District of Columbia residents adopt a street tree and look after it during its early years. QR Code labels hanging on or near newly planted trees resolve to a form on the District Department of Transportation website where residents can sign up for the Canopy Keepers program. Adopters receive a free slow drip watering device for their tree and agree to water, mulch, weed and clear debris. There is even a map showing the location of the newly planted trees so you can see if there is one near you.