Exploring the Growing Threat of Dead Zones in Our Oceans and Waterways

The video discusses dead zones, which are hypoxic areas in large water bodies caused by excess nutrients from agriculture and industry. It explains four types of dead zones: permanent, temporary, seasonal, and diel cycling hypoxia. Examples include the Gulf of Mexico, Baltic Sea, Lake Erie, Chesapeake Bay, and Oregon. The video highlights the rapid growth of dead zones and concerns about future expansion due to industrialization and agriculture.

What are dead zones primarily caused by?

• Agricultural and industrial activities

• Climate change

• Overfishing

• Natural disasters

Which type of dead zone appears annually, usually in the summer?

• Permanent dead zone

• Temporary dead zone

• Seasonal dead zone

• Diel cycling hypoxia

Which dead zone is known as the second largest zone of coastal hypoxia?

• Chesapeake Bay

• Baltic Sea

• Lake Erie

• Gulf of Mexico

What has contributed to the growth of dead zones in the Baltic Sea?

• Increased salinity

• Phytoplankton overgrowth

• Decreased water temperature

• Increased fishing activities

Which regions are at risk of developing more dead zones due to industrialization?

• Europe and North America

• Middle East and Central Asia

• Asia, Latin America, and Africa

• Australia and Antarctica