Which statement about carbon dioxide is accurate?

Which statement about carbon dioxide is accurate?

• A. Can cause breathing problems in humans
• B. Is a solid at room temperature
• C. Has no health effects
• D. Is a nutrient

Answer: (A)

Elevated levels of carbon dioxide can disturb breathing and harm health. In normal air, CO2 is a gas produced by metabolism and expelled by the lungs. When its concentration rises, it alters the body’s drive to breathe and can displace oxygen, leading to symptoms such as headache, dizziness, confusion, shortness of breath, and even loss of consciousness in severe cases. That’s why this statement is accurate: carbon dioxide can cause breathing problems in humans and can be hazardous in higher concentrations. It is not a solid at room temperature, it does have health effects at elevated levels, and it is not a nutrient.

Elevated levels of carbon dioxide can disturb breathing and harm health. In normal air, CO2 is a gas produced by metabolism and expelled by the lungs. When its concentration rises, it alters the body’s drive to breathe and can displace oxygen, leading to symptoms such as headache, dizziness, confusion, shortness of breath, and even loss of consciousness in severe cases. That’s why this statement is accurate: carbon dioxide can cause breathing problems in humans and can be hazardous in higher concentrations. It is not a solid at room temperature, it does have health effects at elevated levels, and it is not a nutrient.