Statement 1: Air contains water vapor which is crucial for the water cycle.
Statement 2: Without nitrogen, the Earth’s atmosphere would be predominantly oxygen.
Statement 3: Carbon dioxide levels have remained constant throughout Earth's history.
Choose the correct statements:
1
All statements are true.
2
S1 and S2 are true, S3 is false.
3
S1 is true, S2 and S3 are false.
4
All statements are false.