Hanna probe and meter measuring pH of water in the headwaters of the River Doethie, Bryn Deilos, Wales, UK

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Photo credit: © camera lucida environment / Alamy / Afripics
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Keywords: acid, acidity, bryn, conifer, coniferous, deilos, deothie, enviornment, forest, forestry, hanna, harm, impact, measure, meter, natural, nrw, ph, plantation, pollute, pollution, probe, resources, science, source, uk, upland, wales