Walden Pond pilgrims pollute one of nature's sacred sites
5 Apr 2018

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Even the waters of Walden Pond, where American environmentalist and writer Henry David Thoreau famously retreated to try to understand nature, are not safe from climate change and other forms of human pollution.
Just-published research shows that water quality in the Massachusetts lake is deteriorating under a wave of human impacts, and scientists say it will get worse as the climate warms.
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