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.
The diameter of Mars is 6,792 km across. This is about half the diameter of Earth. The mass of Mars is even lower; the planet has a mass of 6.42 x 1023 kg, which gives it a mass of only 10% compared to Earth. This lower mass gives Mars a much lower gravity.