Metro PCS's Best Toll-Free/800 Customer Phone Number This is Metro PCS's best phone number, the real-time current wait on hold and tools for skipping right through those phone lines to get right to a Metro PCS agent.
Making the world better, one answer at a time. Thin air is caused by low oxygen pressure at high altitudes. The lack of oxygen makes the air less dense. Thin air is caused by low oxygen pressure at high altitudes. The lack of oxygen makes the air less dense.
Thick mucus in the lungs and sinuses provides an ideal breeding ground for bacteria and fungi. ... Nasal polyps can obstruct your breathing during sleep. Coughing up blood (hemoptysis). Over time, cystic fibrosis can cause thinning of the airway walls.