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.
Ozone depletion is the thinning of the earthâs ozone layer, which is responsible for keeping most of the sunâs ultraviolet radiation. This is caused by the presence of other greenhouse gasses in the atmosphere, and although naturally occurring, the rate of depletion is too fast for nature to cope up with.