Every winter, Delhi transforms into one of the most polluted cities in the world. A dense layer of smog engulfs the city as air quality levels plummet, with AQI often entering the very poor to severe range. While pollution affects everyone, the most significant burden falls on our respiratory system—the gateway through which polluted air directly enters the body.

How Air Pollution Affects Our Lungs

Air pollution is a toxic mix of particulate matter (PM2.5 & PM10), nitrogen dioxide, sulfur dioxide, carbon monoxide, and other harmful gases. When inhaled, these particles penetrate deep into the lungs and can enter the bloodstream.

Short-term effects include:

Cough, throat irritation, and burning eyes

Breathlessness and chest tightness

Exacerbations of asthma and chronic bronchitis

Increased wheezing in children and elderly

Long-term effects include:

Persistent asthma and COPD worsening

Increased risk of lung infections

Lung fibrosis in susceptible individuals

Higher incidence of lung cancer

Reduced lung function in growing children

Patients with pre-existing lung diseases like COPD, ILD, asthma, and post-COVID lung damage are particularly vulnerable. In recent years, we have also observed young non-smokers developing respiratory diseases—pollution is a major contributor.

Children & Elderly Are the Most Affected

Children breathe faster and spend more time outdoors, increasing exposure. Pollution interferes with lung development and may lead to lifelong respiratory compromise. Older adults and individuals with heart disease are also at higher risk of complications, hospitalizations, and even mortality on high-pollution days.

What We Can Do: Practical Measures of Protection

While large-scale policy changes are crucial, there are effective steps individuals can take to reduce exposure and protect lung health.

1. Use of Air Purifiers

HEPA filter–based purifiers significantly reduce indoor PM2.5 levels.

Place purifiers in bedrooms and living rooms where most time is spent.

Ensure regular filter replacement for effectiveness.

Air purifiers do not cure pollution, but they create a cleaner breathing environment indoors, especially for children, elderly individuals, and lung patients.

2. Indoor Plants for Cleaner Air

Certain houseplants can mildly improve indoor air quality by absorbing toxins:

Snake plant

Areca palm

Peace lily

Money plant

While plants alone cannot combat severe pollution, they contribute to a healthier and more oxygen-rich indoor environment, especially when combined with air purifiers.

3. Mask Usage for Outdoor Protection

A properly fitting mask can reduce inhalation of toxic particles during outdoor exposure.

Use N95 or KN95 masks when stepping outside on high-pollution days.

Cloth and surgical masks do not protect against PM2.5.

Children above 5 years and lung patients benefit significantly from clean-air masks.

When to Seek Medical Help

Seek medical consultation if you experience:

Persistent cough >2 weeks

Breathlessness or wheezing

Chest pain or tightness

Symptoms worsening with change in air quality

Early treatment reduces the risk of long-term lung damage.