![](https://environment.princeton.edu/wp-content/uploads/2019/01/Blog_1-17-19.jpg)
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PEI Urban Grand Challenges awards $509,000 to new urban sustainability projects
January 17, 2019 ・ Morgan KellyVertical farms in post-industrial America, origami-based noise-pollution barriers, and cement made from burned waste make up the latest round of projects funded by the Princeton Environmental Institute (PEI) Urban Grand Challenges program. Totaling $509,000, the new awards are active through September…