The Baltic Sea Dead Zones and Their Impact on Marine Life and Climate

The video discusses the impact of dead zones in the Baltic Sea, the largest human-induced dead zone globally, and their contribution to global warming. It explains how these zones form due to rising temperatures and pollution, affecting marine life. Solutions like wave-powered devices and wetlands are explored, alongside positive findings like a seagrass meadow in the Indian Ocean. However, the ongoing loss of oceanic oxygen remains a significant challenge.

What has caused the delay in domestic tourism on Sweden's Baltic coast?

• Dead zones

• Foreign travel restrictions

• Rising global temperatures

• Increased pollution

What is the size of the Baltic Sea's dead zone?

• 90,000 square kilometers

• 70,000 square kilometers

• 50,000 square kilometers

• 100,000 square kilometers

How do dead zones vary in their characteristics?

• They can be seasonal or permanent

• They are always temporary

• They are only found in the Baltic Sea

• They are only found near the coast

What role do seas like the Baltic play in climate change?

• They have no impact on climate change

• They only affect local weather patterns

• They absorb excess heat and carbon dioxide

• They increase global warming

What is one consequence of warming surface waters in the Baltic Sea?

• Increased fish population

• Higher oxygen levels

• More vegetation on seafloors

• Creation of a dead layer beneath

What is one solution tested in the Baltic to address dead zones?

• Building more dams

• Increasing tourism

• Using a wave-powered device to pump oxygen

• Reducing global temperatures

How does the UNESCO wetland project help prevent dead zones?

• By holding water on land longer to absorb pollutants

• By creating more dead zones

• By increasing fish population

• By reducing global temperatures

What recent discovery in the Indian Ocean offers hope for carbon capture?

• A large oil reserve

• A seagrass meadow the size of Switzerland

• A coral reef the size of Switzerland

• A new species of fish

What is the estimated loss of oxygen from the world's oceans over the past 70 years?

• 77 billion tonnes

• 60 billion tonnes

• 100 billion tonnes

• 50 billion tonnes