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<https://substackcdn.com/image/fetch/w_128,h_128,c_limit,f_auto,q_auto:good,fl_progressive:steep/https%3A%2F%2Fsubstack-post-media.s3.amazonaws.com%2Fpublic%2Fimages%2F496b818f-84a0-4221-bf6d-3422217a1def_1280x1280.png>
<https://pritirangnekar.substack.com/p/citizen-science-for-the-river-thames>