Sentences with phrase «hundreds of dead zones»

Hundreds of Dead Zones Exist & Are Expanding Across the globe ocean dead zones are increasing, with over 400 now recognized to exist.

The hundreds of dead zones throughout the world cover nearly 100,000 square miles, with one in the Baltic Sea spanning more than 23,000 square miles several years ago.

Not exact matches

Scientists have long known that nitrate - loaded fertilizers run off from farms and city streets into bodies of water, sometimes creating giant «dead zones» hundreds of miles downstream.

Researchers found several dead zones located hundreds of miles off the coast of West Africa where oxygen levels were 20 times lower than what scientists previously thought.

Hypoxia, or low oxygen levels, can create large dead zones that snuff out marine life and threaten dozens to hundreds of coral reefs worldwide, according to researchers from the Smithsonian Tropical Research Institute or STRI.

In recent years, hundreds of thousands of small pasture - based dairies have disappeared, their production replaced by CAFOs (confined animal feeding operations)-- crowded industrial facilities that use methods linked to a variety of health and environmental problems, from antibiotic resistance to «dead zones» in coastal waterways.