Tag Archives | mpumalanga rivers

River mismanagement behind massive Pakistan flooding

Years of river mismanagement have made the massive floods in Pakistan, which have inundated a fifth of the country and rendered millions of people homeless, worse, experts have said. The Indus River is considered as Pakistan’s lifeline, and since the partition in 1947 people have expanded the canal system to cater to the needs of […]

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Natural Insect Repellents

Making human flesh unappetizing to mosquitoes, ticks, flies, and fleas is an age-old preoccupation.  The earliest insect repellents included smoke, mud, and various plant substances.  Our contemporary contribution is DEET (N, N-diethyl-meta-toluamide), a powerful insecticide found in over 400 repellents.  DEET can peel paint, damage rayon and spandex, and melt plastic.  Up to 56 percent […]

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The Water Hyacinth Problem

Water hyacinth, Eichhornia crassipes, is widely recognized as one of the world’s worst weeds. The plant is a native of the Amazon, but tolerates a wide range of climatic and aquatic conditions, allowing world-wide infestation across a range of latitudes and climates. In South Africa the weed was first recorded on the Cape Flats in […]

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