The Guardian -
20 Jun 2020 16:00

From acoustic engineers in Britain to marine biologists in Canada, researchers made the most of the drastic drop in noise from human activity One of the few upsides of lockdown was that, if a nightingale sang in Berkeley Square, you had a chance of hearing it. City dwellers across the globe delighted in the silence, the freedom from the incessant rumble of traffic, and the joy of birdsong. How cleaner the air seemed, and how splendid the blue skies without their usual grid of aeroplane contrails...
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