Climate

Recycled glass offers a potential new tool to restore a vanishing coastline

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Based on a feed excerpt; full article content has not been acquired. Source evidence retrieved 20/10/2026, 15:39:24 UTC.

Briefings

A five-year research project funded by the U.S. National Science Foundation investigated whether recycled glass sand harms native estuarine animals in Louisiana. The study compared survival rates of several species exposed to glass sand versus other materials. Results showed no significant differences in animal survival, suggesting the material may be safe for coastal restoration. The project was launched in 2020 by Glass Half Full and Tulane University to address sediment shortages for beach building.

Key points

• Glass Half Full partnered with Tulane University to launch Project ReCoast, a five-year NSF-funded study testing recycled glass sand for coastal restoration.
• A 2024 study in Restoration Ecology found no significant differences in survival rates of native estuarine animals exposed to recycled glass sand compared to other materials.

Context

Louisiana lost 4,662 square kilometers of land to coastal erosion since 2020, threatening its $319 billion seafood industry. The state has spent billions on restoration but lacks suitable sediment. Glass Half Full and Tulane University created Project ReCoast to explore using recycled glass sand as a sustainable alternative for building coastal barriers.

Limitations

The evidence is limited to a single published study in Restoration Ecology from April 2024. The study compared only native estuarine animals, not broader ecosystem impacts. Results are based on limited experimental data and do not account for long-term environmental effects or scale-up feasibility.

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