We need good infrastructure to make it easy for people to map their surroundings and good community tools to help us garden the data and improve quality.

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As for the visitors they've welcomed into their world, everything one might need is on hand: The nursery has enough greenery to kit out an entire garden, while the shop sells furniture, gardening tools, baskets, glassware and even the china one eats off of alfresco.

WSJ: Constant Gardeners