Which one of the following statements is false about oxygen?
A. About 21% of oxygen is present in the atmosphere.
B. Humans and animals take oxygen from the air to breathe.
C. Green plants produce oxygen during photosynthesis.
D. Increasing level of oxygen in the atmosphere can cause global warming.
Answer:D
Which one of the following statements is false about oxygen?
A. About 21% of oxygen is present in the atmosphere. B. Humans and animals take oxygen from the air to breathe. C. Green plants produce oxygen during photosynthesis. D. Increasing level of oxygen in the atmosphere can cause global warming.