Question

2 Which of the following statements is/are correct?
Air close to the Earth's surface is heavier.
Air close to the Earth's surface contains larger quantity of water vapour and dust particles.

Answer 1

2nd one air closer to earth surface contains larger quantity of water vapour and dust particles

Answer 2

Air close to the Earth's surface contains larger quantity of water vapour and dust particles b'cuz the air near the Earth's surface is warmer and lighter