wèi shén me为什么yìn dù印度nán yǐ难以dá dào达到shì jiè wèi shēng zǔ zhī世界卫生组织de的kōng qì空气zhì liàng质量biāo zhǔn标准
India has a serious air pollution problem, and many cities have poor air quality.
Although the Indian government has introduced the Air Quality Index and the National Clean Air Programme to reduce air pollution, the effects are not yet obvious.
Air pollution comes not only from local cities but can also be carried by the wind to other places.
In winter, air movement slows down, making it hard for pollutants to disperse, so the air becomes worse.
Scientists suggest that India should manage air quality by regions instead of only looking at each city.
This way, neighboring cities can work together to reduce air pollution.
To improve air quality, India needs stronger policies and the joint efforts of everyone.