Saharan sand and dust blown over from Africa has added to Britain's pollution problems this week. It has been captured in a Met Office satellite sequence.
The Met Office says Saharan dust is lifted by strong winds and can reach very high altitudes; from there it can be transported worldwide by winds, covering distances of thousands of miles. The dust gets caught in rain droplets in clouds, falling to the ground in rain.
Paul Hutcheon from the Met Office said “We usually see this happen several times a year when big dust storms in the Sahara coincide with southerly winds to bring that dust here. More dust rain is possible during showers expected this week.”
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