Smoking is considered to be the number one cause of lung problems all over the world.
Since many people engage themselves into smoking, a lot have been suffering from many lung problems.
Smoking destroys the tiny hairs called cilia, which line the upper airways and protect us against infection.
Normally, our lungs consist of a thin layer of mucous and the cilia line the inside of our breathing tubes.
The mucous is responsible for trapping dirt and pollution we breathe in and the cilia move in a wave-like motion to push the dirt-filled mucous out of our system.
When the lungs' natural cleaning and repair system gets damaged, dirt, germs and other chemicals from cigarette smoke stays inside our lungs.
This could ultimately lead us to acquire lung problems such as chronic cough, chest infections, lung cancer and COPD.

• Smoking for several years scars the lungs which weakens breathing and reduces the body's oxygen content.
  Here are a few steps you need to religiously follow to have clear lungs after smoking:
• Eat a lot of pineapples.
  Pineapples contain bromelin which cleanses the lungs in a cellular level thus increasing its elasticity to allow you to breathe deeper and use more oxygen.
  
• Add garlic to your meals.
  Garlic contains allicin which acts by dissolving the toxic mucous that was left after smoking.
  It also kills bacteria and assists you to breathe normally.
  
• Eat apples.
  Eating a lot of apples regularly improves lung function and it also detoxifies the lungs in a cellular level.
  Apples contain a lot of ascorbic acid and magnesium.
  
• Drink a cup of green tea after dinner.
  Green tea contains the antioxidant catechin, which helps in the prevention of cancer.
  It also helps in clearing out the toxic mucous which accumulated in your lungs due to too much smoking.
  
• Perform yoga breathing exercises.
  Breathing exercises cleanses the lungs.
  Perform these exercises every day before breakfast.
  
• Have a regular exercise.
  Exercise helps you breathe effectively and helps you build your endurance.
  This can also be a great substitute to smoking.
  Regular exercise produces biochemical changes similar to effects of nicotine, including enhanced mental sharpness and a greater sense of calmness.
  Exercise generates catecholamines which help to increase mental alertness; endorphins which help to decrease feelings of anxiety and depression.
  
• Vitamin A or retinoic acid.
  This vitamin helps in rebuilding your lungs by restoring alveoli.
  
• Drink lots of water.
  Drinking a lot of water improves digestion of enzymes, flushes out toxins, softens deposits and phlegm and lubricates the tissues.
  
• Smoking does no good.
  So if you love your family and friends, tell them to stop smoking and start clearing their lungs.
  Clearing the lungs is a good step to keep you healthy.
  There are still a lot more ways to have clearer lungs.