Fresh Air

The air pollution levels in many parts of the world are severe. 

Nine out of ten people worldwide breathe polluted air, and air pollution causes the death of seven million people each year.

Tiny pollutants in the air breach our body's defenses, entering our respiratory and circulatory systems, damaging our lungs, heart, and brain. 

One-third of deaths caused by strokes, lung cancer, and heart disease are attributed to air pollution.

Professor Nicola Carslaw, a professor of indoor air chemistry at the University of York, points out that most of our exposure to pollutants occurs indoors.

According to data from the U.S. Environmental Protection Agency (EPA), indoor air pollution levels can be 2 to 5 times higher than outdoor levels.

There are various sources of indoor air pollution. Examples include cooking (especially frying and baking), cleaning products, vacuum cleaners, paints, building materials, fire, and candles, all of which release tiny particles.

Research has found that frying eggs or preparing breakfast can release a large amount of fine pollutant particles known as PM2.5.

Experts believe that removing pollution sources and ventilation are key to reducing indoor air pollution.

If you have found air pollution indoors, opening windows for ventilation is recommended. However, if you live near a busy road or in the city center, opening windows may only introduce more pollution indoors.

In such cases, experts suggest using high-efficiency particulate air (HEPA) filters, which can effectively remove the smallest particles, such as PM2.5, nitrogen oxides, and nanoparticles, the most dangerous pollutants.

世界许多地方的空气污染程度很严重。

全球十分之九的人呼吸被污染的空气，每年因空气污染造成的死亡人数达到700万人。

空气中的细微污染物突破我们的身体防线，深入我们的呼吸和循环系统，损害我们的肺部、心脏和大脑。

由中风、肺癌和心脏病导致的死亡人数当中，高达三分之一缘于空气污染。

英国约克大学（University of York）室内空气化学教授尼古拉·卡斯劳(Nicola Carslaw)指出：人们暴露在污染物中，绝大部分都发生在室内。

根据美国环境保护署(Environmental Protection Agency, EPA)的数据，室内空气污染物的水平可能是室外的2到5倍。

室内空气污染来源多种多样。例如：烹饪(特别是油炸和烘烤)、清洁用品、吸尘器、油漆、建筑材料、火和蜡烛都会释放出微小的颗粒。

研究发现，煎蛋或做早餐会释放出大量被称为pm2.5的微小污染物颗粒。

专家认为，要减少室内空气污染，去除污染源和通风都是主要关键。

如果你意识到室内产生空气污染，那么就打开窗户通风。 

然而，如果你住在繁忙的公路附近或城市中心，打开窗户可能只会给室内带来更多的污染。

在这种情况下，专家建议使用高效微粒空气过滤器，能够有效去除最微小的颗粒，比如PM2.5、氮氧化物和纳米颗粒等等最致命的污染物。