Noise:
a sound, especially one that is loud or unpleasant or that causes disturbance.
Pollution:
the presence in or introduction into the environment of a substance which has harmful or poisonous effects.
One in four adults shows signs of noise-induced hearing loss, and hearing loss is America’s third most comment chronic health condition, just after diabetes and cancer.
Here’s a useful article about noise induced hearing loss, what causes it and what we can do to prevent it.