Uncategorized
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19552
This article, on the deleterious effect of dams on coastal systems, contains a major conceptual error. It states that “another important cause of the ground sinking is the waning of sediment deposition by the Mississippi River.” But over the past 100 million years, the northern Gulf Coast region has been subsiding because of excessive sediment […]
- Earth
Muddy Waters
Even though human activities such as agriculture and deforestation are sending more sediment into streams and rivers, less of that material is reaching river deltas, a trend that exacerbates problems such as subsidence and coastal erosion.
- Chemistry
Boxes coated with citronella repel insects
A fragrant grass extract known as citronella oil may deter insects from infesting cartons of food.
