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algae bloom

Algal blooms are not a new for Lake Erie. In the 1960s and 70s, blooms were so bad the lake was described as "dead." But despite the success of earlier remedial measures, harmful algal blooms are back and bigger than ever. Algal blooms later this summer are expected to be among the worst ever seen in Lake Erie.
2013-09-04-TWB_HuffPo_EBanner.jpg Across the world, vast areas of oceans and lakes are running out of oxygen, making it nearly impossible for marine life to survive. In the 1960s, there were 49 dead zones throughout the ocean; today there are more than 400 and the number is still growing. When water becomes too low in oxygen, or "hypoxic," marine life flees and everything that is too slow or cannot move will die, creating a dead zone. This will not go away on its own.