Every year when winter arrives, India's capital region is choked by smog and smoke. Experts say there are already solutions waiting to be implemented, but more political will is needed.

Hundreds of millions of Indians breathe some of the world’s most toxic air all year round. Air pollution in the capital area that’s home to about 30 million people is especially stubborn. In winter, the cold weather actually makes the smog even worse — and potent.

Unhealthy

Air quality continues to be a significant concern, with several key locations across the city reporting 'very poor' conditions and notable fluctuations in pollution levels