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.
Here, not only mass but also density becomes important. A denser planet will have more mass than another of the same size. The Earth is the denser planet in the Solar System, which means that it surface gravity is very high compared to its mass. Because of that we have a bigger surface gravity than Uranus (the earth has 9.79 m/sÂ² while Uranus has 8.87), and almost as big as Saturn and Neptune (10.44 and 11.15 respectivelly).