Theses are the parts at the bottom of the ocean with no dissolved oxygen left for marine creatures to live.

They are often called ‘biological deserts’, as they are enhanced due to human activity.

Ocean dead zones worldwide have increased, and many marine animals have lost their lives.

Excessive nutrients released from land or dumped as waste into rivers, and streams lead to the growth of harmful algae.

The decomposition process absorbs oxygen, and marine life is deprived of this much-needed oxygen. 

Algal blooms form dead zones beneath them, preventing light from penetrating the water’s surface. 

Dead zones stretch hundreds of square miles and are present in many coastal areas and the Great Lakes region.

Scientists are trying to reduce the emissions in regions where dead zones pose a serious issue to the marine ecosystem.

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