AFP: The vast majority of the world’s rivers are reeling from pollution, over-development and excessive extraction, and billions of dollars of investment by rich countries to avert water stress have damaged biodiversity, a study released on Wednesday said. “Rivers around the world really are in a crisis state,” said one of its authors, Peter McIntyre, a professor of Zoology at the University of Wisconsin at Madison. The investigation, published by the journal Nature, looked at the …