A man wearing a mask looks on as he walks in a market in New Delhi, India, November 6, 2018. REUTERS/Anushree Fadnavis
People light fire crackers wearing masks to fight pollution as they celebrate Diwali, the festival of lights in Hyderabad, India, Wednesday, November 7, 2018. The Supreme Court recently ruled that only less polluting firecrackers should be manufactured and sold. (AP Photo/Mahesh Kumar A.)
Devotees light earthen lamps on the banks of the River Sarayu as part of Diwali celebrations in Ayodhya, India, India, Tuesday, November 6, 2018. The city of Ayodhya made an attempt to break the Guinness Book of World record when several earthen lamps were lit at the banks of river Saryu on the occasion of Diwali – the festival of light. (AP Photo/Rajesh Kumar Singh)
Devotees light earthen lamps on the banks of the River Sarayu as part of Diwali celebrations in Ayodhya, India, India, Tuesday, November 6, 2018. (AP Photo/Rajesh Kumar Singh)
A slum colony is decorated with lanterns and lights as they celebrate the Hindu festival Diwali in Mumbai, India, Tuesday, November 6, 2018. (AP Photo/Rafiq Maqbool)
A girl makes a design called 'Rangoli', traditionally made on Diwali, with colored chalk in the courtyard of a house in Dharmsala, India, Wednesday, November 7, 2018. Diwali, the festival of lights was celebrated in most parts of India on Wednesday. (AP Photo/Ashwini Bhatia)
Indian people fly sky lanterns as they celebrate the Hindu festival Diwali, the festival of lights in Kolkata, India, Wednesday, Nov. 7, 2018. (AP Photo/Bikas Das)
People fly sky lanterns as part of the Diwali celebrations in Kolkata, India, Wednesday, November 7, 2018. (AP Photo/Bikas Das)
In an effort to curb air pollution, several people fly sky lanterns as they celebrate the Hindu festival Diwali, the festival of lights in Kolkata, India, Wednesday, November 7, 2018. (AP Photo/Bikas Das)
A family lights fire crackers as they celebrate Diwali, the festival of lights at a playground in Mumbai, India, Wednesday, November 7, 2018. (AP Photo/Rajanish Kakade)
Little girls dressed in traditional attires light fire crackers as they celebrate Diwali, the festival of lights in Mumbai, India, Wednesday, November 7, 2018. (AP Photo/Rafiq Maqbool)
A boy runs through a lane decorated with lanterns during Diwali, the festival of lights in Mumbai, India, Wednesday, November 7, 2018. (AP Photo/Rafiq Maqbool)
A residential building is decorated with lanterns and lights during Diwali, the festival of lights in Mumbai, India, Wednesday, November 7, 2018. (AP Photo/Rafiq Maqbool)
An eagle eye view of residential buildings being decorated with earthen lamps, colorful lights during Diwali festival on the outskirts of New Delhi, India, Wednesday, November 7, 2018. (AP Photo/Altaf Qadri)
A firecracker lights up in the sky, while residential buildings are decorated with colorful lights, during Diwali festival on the outskirts of New Delhi, India, Wednesday, November 7, 2018. (AP Photo/Altaf Qadri)
A woman lights fire crackers during Diwali festival on the outskirts of New Delhi, India, Wednesday, November 7, 2018. (AP Photo/Altaf Qadri)
An aerial view of residential buildings being decorated with colorful lights, during Diwali festival on the outskirts of New Delhi, India, Wednesday, November 7, 2018. (AP Photo/Altaf Qadri)
A girl lights fire crackers as she celebrates Diwali, the festival of lights in Hyderabad, India. Diwali is considered as the celebration of good triumphing over the evil. Wednesday, November 7, 2018. (AP Photo/Mahesh Kumar A.)
An auto rickshaw driver waits at a street and watches others light fire crackers to celebrate Diwali, the festival of lights in Hyderabad, India, Wednesday, November 7, 2018. (AP Photo/Mahesh Kumar A.)
Families gather together to play with firecrackers to traditionally celebrate Diwali in Allahabad, India, Wednesday, November 7, 2018. Diwali, the festival of lights, is one of Hinduism's most important festivals dedicated to the worship of Lakshmi, the Hindu goddess of wealth. (AP Photo/Rajesh Kumar Singh)
A kid plays with firecrackers to celebrate Diwali in Allahabad, India, Wednesday, November 7, 2018. (AP Photo/Rajesh Kumar Singh)
A vendor arranges idols of Hindu goddess Lakshmi and other decorative articles at a road side market ahead of Diwali, the festival of lights in Hyderabad, India, Tuesday, November 6, 2018. (AP Photo/Mahesh Kumar A.)
Devotees light earthen lamps on the banks of the River Sarayu as part of Diwali, the festival of lights celebrations in Ayodhya, India, India, Tuesday, November 6, 2018. The city of Ayodhya has broken a Guinness World Record after lighting 300,150 earthen lamps and keeping them lit for at least 45 minutes. (AP Photo/Rajesh Kumar Singh)
The view from the banks of the River Sarayu, where devotees lit earthen lamps as part of Diwali celebrations in Ayodhya, India, India, Tuesday, November 6, 2018. (AP Photo/Rajesh Kumar Singh)
A combination picture shows the Jawaharlal Nehru stadium on a smoggy morning in New Delhi, India on November 8, 2018 (top) and at the same place on November 7, 2018. REUTERS/Altaf Hussain
Men travel in a trishaw as firecrackers burn on a street during Diwali, the Hindu festival of lights, in New Delhi, India, November 7, 2018. REUTERS/Anushree Fadnavis
Men light firecrackers on a street as they celebrate Diwali, the Hindu festival of lights, in New Delhi, India, November 7, 2018. REUTERS/Anushree Fadnavis
A man crosses a road on a smoggy morning in New Delhi, India, November 8, 2018. REUTERS/Anushree Fadnavis
A man lights a firecracker while celebrating the Hindu festival of Diwali, the annual festival of lights in Mumbai, India, November 7, 2018. REUTERS/Danish Siddiqui
A man lights a firecracker on a street as he celebrates Diwali, the Hindu festival of lights, in Mumbai, India, November 7, 2018. REUTERS/Francis Macarenhas
A family lights firecrackers as they celebrate Diwali, the Hindu festival of lights, in New Delhi, India, November 7, 2018. REUTERS/Anushree Fadnavis
A boy lights a firecracker on a street as he celebrates Diwali, the Hindu festival of lights, in New Delhi, India, November 7, 2018. REUTERS/Anushree Fadnavis
Buildings are seen shrouded in smog, after Diwali celebrations on November 7 in New Delhi, India. November 8, 2018. REUTERS/Anushree Fadnavis
Buildings are seen shrouded in smog in New Delhi, India, November 8, 2018. REUTERS/Anushree Fadnavis
Buildings are seen shrouded in smog in New Delhi, India, November 8, 2018. REUTERS/Anushree Fadnavis