A magnetic field is created by the flow of an electric current.
The Alveolar macrophages, Cilia and the mucus layer
Answer:
45 mg of caffeine in one cup of instant coffee.
Smoking ruins your lungs making it harder to breath and get oxygen
you need oxygen when you exercise so you don't faint
smokers get less so it is harder for them, its like trying to exercise while breathing through a sponge or a straw os