冬季开窗，驱走“人味污染”
严寒的冬天，不少家庭为了保暖，常把门窗关得紧紧的。人们在室内活动时间较多，户外活动明显减少，这样一来，室内空气就有可能被严重污染，而影响人的身体健康。
室内空气污染，除了外部环境因素外，还与“人味污染”有关。
所谓“人味污染”，就是人体在代谢过程中，会产生大量的化学物质，共计500余种，其中从呼吸道排出的有149种，如二氧化碳、氨等。让3个人在门窗紧闭的10平方米的房间看书，3小时后检测发现，二氧化碳增加了3倍，氨增加了2倍。故紧闭门窗的时间越长，室内二氧化碳的浓度就越高。
皮肤是人体最大的器官，经它排泄的废物多达171种。英国科学家曾对室内尘埃进行测定，发现尘埃中90％的成分竟是人体皮肤脱落的细胞。另外，经汗液蒸发的尿酸、尿素、盐分、皮脂腺的分泌物等等，皆从皮肤散发到室内空气中。
即使是健康人，每天通过吐痰、咳嗽、打喷嚏等，也会排出400亿个细菌、病毒等微生物，弥散在空气中造成污染。若是房间内有病人，则排出的病原微生物和有毒物质会更多。
An earthquake is a shaking of the ground caused by the sudden breaking and shifting of
large sections of Earth''s rocky outer shell.
rs2 powerlevelingEarthquakes are
among the most powerful events on earth, and their results can be terrifying. A severe
earthquake may release energy 10,000 times as great as that of the first atomic bomb. Rock
movements during an earthquake can make rivers change their course.
yantaiEarthquakes can trigger landslides that
cause great damage and loss of life. Large earthquakes beneath the ocean can create a
series of huge,
archlord golddestructive waves called tsunamis (pronounced tsoo NAH meez) that flood coasts for many
miles.
Earthquakes almost never kill people directly. Instead, many deaths and injuries in
earthquakes result from falling objects and the collapse of buildings,
lineage2 adenabridges, and other
structures. Fire resulting from broken gas or power lines is another major danger during a
quake. Spills of hazardous chemicals are also a concern during an earthquake.
The force of an earthquake depends on how much rock breaks and how far it shifts.
Lineage2 powerlevelingPowerful
earthquakes can shake firm ground violently for great distances. During minor earthquakes,
the vibration may be no greater than the vibration caused by a passing truck.
On average, a powerful earthquake occurs less than once every two years.
lotro powerlevelingAt least 40
moderate earthquakes cause damage somewhere in the world each year.
yantaiAbout 40,000 to 50,000 small earthquakes--
large enough to be felt but not damaging--occur annually.
Related Articles:
Lineage2 powerleveling!Lineage2 powerleveling!Lineage2 powerleveling!Lineage2 powerleveling!Lineage2 powerleveling! 为了防治这些“人味污染”，首先是要经常开门开窗，通风换气，即便冬季气候寒冷，每天开窗亦应在2～4次左右。另外，还应注意个人卫生，勤洗澡理发，换洗衣服，常晒被褥，室内经常扫地拖地板，家具要用湿抹布擦洗，防止灰尘飞扬。
