The environment of air in Menshan mountain is fresh and clean due to large amount of negative ion of oxygen in the air which the content reach about 2.2million per cu.cm, 4400 times of common air.

• 蒙山大气环境清新宜人，每立方厘米空气中负氧离子含量高达220万个，是空气中负氧离子的4400倍，被喻为“天然氧吧、养生圣地、长寿摇篮”。