Riverbed sand is preferred for construction materials, but this is where the greatest environmental and local human consequences of mining activities happen, according to the review study. Aggregate extraction of sand from rivers leads to pollution, flooding, lowering of water levels, undrinkable water, worsening drought occurrence, and threats to natural habitats.
Lake Superior water levels drop after hot, dry summer
Hot summer weather and drier than average conditions have led to a lowering of Lake Superior water levels. The International Lake Superior Board of Control (ILSBC) said water levels had declined and reached the seasonal long-term average for the first time since April 2014. In its September update, the ILSBC said Lake Superior declined three centimetres in the month of August, a month that normally see the lake rising one centimetre.