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Showing posts from October 9, 2011

Lake Eries' Toxic Algae Bloom Seen From Space

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Lake Erie's Toxic Algae Bloom Seen From Space

Toxic algae is sucking the oxygen out of Lake Erie.

The lake is currently undergoing one of the worst algae blooms in decades, turning the water a scummy bright green. According to NASA, blooms like this did occur in the 1950's and 60's, but now phosphorus from farms, sewage, and industry have fertilized the waters.

After the 60's, increased regulations and improvements in agriculture and sewage treatment limited the phosphorus and helped to control the blooms. However, the shallower Western basin near Detroit has been more susceptible to the algae than other deeper areas.

The exact reason behind the bloom is a bit unclear, but scientists believe it could be linked to increased rainfall and, believe it or not, mussels. It seems the types of mussel, zebra and quagga that have invaded the lake feed on phytoplankton instead of algae, making it even easier for the blooms to occur, according to NASA.

While the algae doesn't …

India And Pakistan At Odds Over Shrinking Indus River

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India and Pakistan At Odds Over Shrinking Indus River.

By William Wheeler

For National Geographic News

Published October 12, 2011


This story is part of a National Geographic News series on global water issues.

Nearly 30 percent of the world's cotton supply comes from India and Pakistan, much of that from the Indus River Valley. On average, about 737 billion gallons are withdrawn from the Indus River annually to grow cotton—enough to provide Delhi residents with household water for more than two years. (See a map of the region.)


"Pakistan's entire economy is driven by the textile industry," said Michael Kugelman, a South Asia expert at the Woodrow Wilson International Center for Scholars. "The problem with Pakistan's economy is that most of the major industries use a ton of water—textiles, sugar, wheat—and there's a tremendous amount of water that's not only used, but wasted," he added.

The same is true for India.

That impact is an important part…