Air pollution can vary sharply within a single city, with a busy junction, a bus depot or a sheltered street recording very different conditions.
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Beneath the surface of cool coastal seas, kelp forests once swayed like underwater woodlands.
Satellite records and new ocean measurements are converging on a difficult picture for Arctic sea ice: even in years when winter freezing looks.
Mountain lakes famous for their clarity are slowly changing colour, as long-term monitoring shows many shifting from deep blue toward green.
Walking groups and mental health charities are promoting curiosity walks, a small twist on the daily stroll in which the walker sets out to notice.
Most large fishing vessels broadcast their positions automatically, but a significant share of the world’s fleet goes dark, switching off tracking.
For many people the last hour of the day is spent scrolling, watching clips or answering messages in bed, and the mind arrives at sleep still busy.
The colour of the ocean, seen from space, is a biological signal.
Algae growing on the underside of Arctic sea ice are emerging as a crucial foundation of the polar food web, and new research suggests their.
Conversation researchers have a modest suggestion for anyone who wants their talks to go better, and it costs nothing at all.