Are fireflies vanishing from the U.S. and Canada because of light pollution? A new study by the Museum of Science Boston aims to use the backyard observations of hundreds of citizens to find out.

"Great Lakes pollution is getting worse because sewage systems are outdated and Ontario’s north is turning into a Wild West for miners and forestry companies, warns Environmental Commissioner Gord Miller."

"The contamination of many First Nations by unregulated landfills and dumps is a dirty story that has yet to be fully told. Aside from the mess you can see – and smell – the risk of groundwater pollution is probably the most severe environmental impact from these waste sites. Add an improperly engineered garbage dump and the results are more than toxic."

"The fish are hard to look at. One whitefish has a golfball-sized tumour bulging from its side. Another is simply missing part of its spine, its tail growing from a stumpy rear end."

"Though B.C. has said the project could net $5-billion worth of economic activity, local natives say they'll give their lives to stop it."

"After years of declining sockeye numbers and a struggling fishing industry, the Pacific Salmon Commission last week said it now expects 25 million sockeye will return to the Fraser River this year -- more than double its earlier forecast and the best run since 1913."

"Edmonton -- A study set to be published on Monday has found elevated levels of mercury, lead and eleven other toxic elements in the oil sands'  main fresh water source, the Athabasca River, refuting long-standing government and industry claims that water quality there hasn't been affected by oil sands development."

"Canada is in the process of a historic move to add bisphenol-A to its list of toxic substances, Environment Canada confirmed Wednesday."