January 15, 1990 |
A tiny, astoundingly prolific Eastern European shellfish has invaded the Great Lakes, permanently altering the fragile aquatic ecosystem and threatening a water supply that tens of millions of Americans and Canadians depend upon for drinking, electricity, industry and recreation. Zebra mussels--pinto bean-sized mollusks marked with brown and white zigzag stripes--are creating environmental havoc in the Midwest now.
February 25, 1990 |
A four-year-long drought in the upper Midwest that has dried up streams and wetlands, cut into drinking water supplies for hundreds of thousands and left forests vulnerable to fire and disease shows no signs of abating, climatologists say. The drought, the region's worst since 1961, when an eight-year dry period ended, already is bad news for the Midwest's economy, wildlife and recreation, and "the odds suggest continuation of the . . .