https://earth5r.org/periyar-river-restoration-csr/
Periyar River and the Path to Urban Sustainability: A Blueprint for Ecological Revival Through the...
Sep 26, 2026 - Join Earth5R BlueCities CSR to restore Periyar River, fight pollution, and promote sustainable water and community health..
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https://microcosmos.foldscope.com/post/transfer_46705
periphyton from periyar river
periyar riverperiphyton