Scientists are expecting a very large “dead zone” in the Gulf of Mexico based ... zones are caused by excessive nutrient pollution, often from human activities such as agriculture, which ...

You can easily identify those that are affected because they are dead.” The lake, once 28 metres deep, now holds just 18 metres of water due to sediment buildup and pollution. “Probiotics ...

the main water supply for Zimbabwe's capital, Harare, has transformed from a pristine natural wonder to a polluted and mismanaged crisis zone. Once teeming with biodiversity and a magnet for ...