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.
How big is Earth. As youâll know already Earth is the third planet form the Sun (Mercury, Venus, Earth) in our solar system. Itâs what we call a terrestrial planet and is in the inner solar system. If we where to start at the equator and go around, the Earthâs equatorial diameter is 7,926 miles or 12,756 kilometers. (in 1980 a B-52 plane took 47 hours to fly around the planet, it was refueled in flight.