It is often observed that people living in hilly areas suffer from goiter because:

اکثر دیکھا گیا ہے کہ پہاڑی علاقوں میں رہنے والے لوگ گٹھلی کا شکار ہوتے ہیں کیونکہ

Of low atmospheric pressure there, their diet and drinking water are deficient in iodine

of low temperature

of non availability of sufficient amount of oxygen

of presence of rich density of ozone layers in the early morning hours