Soil erosion in the catchment areas leads to the silting of river beds, which soon offsets the protective value of embankments.

ECONOMIST: From the archive

Dodd-Frank is vague, burdensome, of no protective value, and anti-growth.

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But there is already a campaign to raise awareness within police ranks about the value of protective vests, with officers on the beat being invited to join the debate about safety.

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