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.
Causes of Condensation. One of the main causes for condensation on air conditioning ductwork is when the outside of ductwork is cooled down and makes contact with warmer, more humid outside air. This is common especially in attics and crawl spaces, which can very easily reach high temperatures during the summer.