• Make an uber-DIY version. I read about these first at Inside Urban Green, which seems to be home base for SIP champions. Examples include sub-irrigation grow boxes made from rubber totes, sheets of foam insulation, and vinyl tubing (all available at your local hardware store); "fire escape salad bars" made from mortar boxes, perforated corrugated drain pipes, and empty water bottles; and the recycled plastic soda-bottle SIPs promoted this month at New York City's Festival of Ideas.
Deirdre Fulton can be reached at firstname.lastname@example.org.
: The Editorial Page
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