1 One of the adverse effects of smoking analogue cigarettes is the damage to the cilia. 2  Cilia are the small hair-like organelles which assist in reducing your risk of infections by pushing mucus out of your lungs. 3  The regenerative process your lungs undergo include the repair of the cilia.
Mars is approximately half the diameter of Earth, and its surface area is only slightly less than the total area of Earth's dry land. Mars is less dense than Earth, having about 15% of Earth's volume and 11% of Earth's mass, resulting in about 38% of Earth's surface gravity.
Earth is the largest of the four inner planets, although it is nothing compared to the gas giants. Earth has a volume of 1.08 x 10 12 cubic kilometers. Mars is actually a rather small planet with a volume of 1.6 x 10 11 cubic kilometers. While that is larger than Mercuryâs volume and pretty big in general, it is only 15% of Earthâs volume. You could put over six planets the size of Mars inside the Earth.