Experts say successful implementation remains challenging, call for year-round actions People are seen through smog in New Delhi on Nov. 4.

Experts say successful implementation remains challenging, call for year-round actions People are seen through smog in New Delhi on Nov. 4. © Reuters NEW DELHI -- With falling temperatures and low-speed dry winds, India's capital is facing alarming pollution levels, even as authorities have rolled out a comprehensive winter action plan to combat seasonal toxic smog through measures such as curbs on older vehicles and construction activities, and higher parking charges.