Archive · 12 Dec 2025

Delhi's toxic air harms trees, reduces oxygen production: DU study

Delhi's toxic air harms trees, reduces oxygen production: DU study

A study by Delhi University found that the city's polluted air is harming trees.

The researchers looked at ten common tree species in Delhi and found that winter pollution is especially bad.

It makes leaves thinner, reduces their water content, and lowers chlorophyll levels.

Chlorophyll is important because it helps trees make oxygen.

The study found that some trees, like Amaltas and Bargad, can handle pollution better, while others, like Saptparni and Bael, are more sensitive.

The researchers also found that pollution makes leaves more acidic and increases a stress chemical called proline.

This shows that pollution is making it harder for trees to stay healthy and produce oxygen.

Sources