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.
Other natural causes of air pollution are natural sources of particulate matters like volcanoes and dust storms, volatile organic compounds, pollen, forest fires, oceans, and forest fires. 1  Natural Air Pollution: Highlights the main natural causes of air pollution.