Roofs Paved with Green

Pollutant-filtering plants embedded into paving stones are set to change the skyline in the Bronx

For Joe Hagerman the transition from streets to rooftops has been a natural one, conceptually speaking. Over the past year he has researched how his Biopaver design, which embeds pollutant-filtering plants into city paving stones, can be adapted to improve green roofs. The result is a streamlined system that he believes is easier to install and provides better insulation. It will soon be put to the test on a New York City school, where Hagerman hopes to demonstrate its benefits—not only for the future of green-roofing but also for the local community.

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