TED: How pollution is changing the ocean's chemistry | Triona McGrath

The video highlights the critical role of oceans in our lives, providing oxygen, food, and climate regulation. It introduces ocean acidification, a process exacerbated by carbon dioxide emissions, and its detrimental effects on marine life. The video explains how scientists monitor these changes and the potential consequences for marine ecosystems, including species extinction. It concludes with a call to reduce carbon emissions to mitigate these impacts and preserve ocean health for future generations.

What percentage of the Earth's surface is covered by oceans?

• 66%

• 80%

• 50%

• 75%

What is the primary cause of ocean acidification?

• Increased carbon dioxide levels

• Decreased nitrogen levels

• Decreased carbon dioxide levels

• Increased oxygen levels

How do scientists collect data to monitor ocean acidification?

• By observing fish behavior

• By collecting air samples

• By lowering instruments from ships

• By using satellites

What happens to marine species that rely on carbonate ions as ocean acidity increases?

• They thrive and grow faster

• They find it harder to build shells

• They become more colorful

• They migrate to warmer waters

What is the expected increase in ocean acidity by the end of the century if carbon emissions are not reduced?

• 50%

• 100%

• 170%

• 200%

What percentage of marine life do coral reefs support?

• 75%

• 10%

• 25%

• 50%

What is the key action needed to slow down ocean acidification?

• Increase fishing activities

• Reduce water pollution

• Increase ocean exploration

• Reduce carbon dioxide emissions