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.
Asthmatics (people suffering from asthma) often complain of thick and viscous mucus. This is because when you have asthma; excess mucus is produced, blocking the airways. This causes breathing to become difficult as your airways become clogged due to the decrease in mucus drainage. Mucus is functional in coating the organ membranes, preventing pollutants from invading and irritating the organs.