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.
Air pollution occurs when harmful substances including particulates and biological molecules are introduced into Earth's atmosphere. It may cause diseases, allergies or death in humans; it may also cause harm to other living organisms such as animals and food crops, and may damage the natural or built environment.