Environmental Impact of CO₂ and Ocean Acidification

What has been increasing in Earth's atmosphere due to human activities?

• Oxygen levels

• Carbon dioxide (CO₂) levels

• Nitrogen levels

• Methane levels

What are two human activities mentioned that contribute to the increase in CO₂ levels?

• Planting trees and recycling

• Burning fossil fuels and deforestation

• Fishing and agriculture

• Solar energy and wind power

What environmental issue is caused by the absorption of CO₂ by the ocean?

• Global warming

• Ocean acidification

• Ozone depletion

• Desertification

What does ocean acidification reduce that is essential for marine organisms?

• Oxygen levels

• Carbonate ions

• Nitrogen levels

• Hydrogen ions

Which marine organisms are affected by the reduction of carbonate ions?

• Fish

• Corals

• Sea turtles

• Dolphins

What vital ecosystems are threatened by the decline of coral reefs?

• Forests

• Deserts

• Marine ecosystems

• Grasslands

What does the graph in the document illustrate?

• Decrease in CO₂ levels

• Increase in atmospheric CO₂ levels

• Stable CO₂ levels

• Fluctuating CO₂ levels

Over what time period does the graph show the increase in CO₂ levels?

• 1900 to 1960

• 1960 to 2020

• 2000 to 2020

• 1980 to 2000

What is one possible reason for the rise in atmospheric CO₂ levels over the last 60 years?

• Increased volcanic activity

• Human activities like burning fossil fuels

• Natural CO₂ absorption by plants

• Decrease in industrial activities

What is the main problem affecting coral reefs as mentioned in the text?

• Overfishing

• Ocean Acidification

• Water Pollution

• Climate Change