Workers make firecrackers at a factory ahead of Diwali, the Hindu festival of lights, on the outskirts of Ahmedabad, India, October 17, 2019.

A woman picks globe amaranth flowers, used to make garlands and offer prayers, before selling them to the market for the Tihar festival, also called Diwali, in Bhaktapur, Nepal October 21, 2019.

A worker makes firecrackers at a factory ahead of Diwali, the Hindu festival of lights, on the outskirts of Ahmedabad, India, October 17, 2019.

Women work to make garland from the globe amaranth flowers, before selling them to the market for the Tihar festival, also called Diwali, in Bhaktapur, Nepal October 21, 2019.

A woman picks globe amaranth flowers, used to make garlands and offer prayers, before selling them to the market for the Tihar festival, also called Diwali, in Bhaktapur, Nepal October 21, 2019.

People buy lanters and lamps, which are used to decorate places of worship and homes, ahead of Diwali, the Hindu festival of lights, at a market in Mumbai, India, October 21, 2019.

A potter family makes earthen lamps which are used to decorate temples and homes during Diwali, the Hindu festival of lights, at a workshop in Kolkata, India October 18, 2019.

Women buy artificial jewellery and decorative items at a market ahead of Diwali, the Hindu festival of lights, in Ahmedabad, India, October 18, 2019.

A potter makes earthenware oil lamp or "Diyo" used to decorate temples and homes ahead of Tihar festival, also called Diwali, the Hindu festival of lights, in Bhaktapur, Nepal October 20, 2019.

A hand of a woman is pictured as she collects globe amaranth flowers, used to make garlands and offer prayers, before selling them to the market for the Tihar festival, also called Diwali, in Bhaktapur, Nepal October 21, 2019.

Students wearing masks take part in an anti-firecrackers campaign to raise awareness about pollution ahead of Diwali, the Hindu festival of lights, in Kolkata, India October 22, 2019.

Shoppers crowd at a market place ahead of Diwali, the Hindu festival of lights, in Ahmedabad, India, October 22, 2019.

A man walks along the street decorated with lights ahead of Tihar festival, also called Diwali, the Hindu festival of lights, in Kathmandu, Nepal October 22, 2019.

A worker prepares gunpowder to make firecrackers at a factory ahead of Diwali, the Hindu festival of lights, on the outskirts of Ahmedabad, India, October 17, 2019.

Globe amaranth flowers, used to make garlands and offer prayers, blooms on the field before selling them to the market for the Tihar festival, also called Diwali, in Bhaktapur, Nepal October 21, 2019.

A street vendor sells colourful balloons along the street of Ashon, one of the busiest market places, in central Kathmandu ahead of Tihar festival, also called Diwali, the Hindu festival of lights, in Kathmandu, Nepal October 22, 2019.

A potter makes earthenware oil lamps or "Diyo" used to decorate temples and homes ahead of Tihar festival, also called Diwali, the Hindu festival of lights, in Bhaktapur, Nepal October 20, 2019.

A worker checks the dryness of wicks used to make firecracker at a factory ahead of Diwali, the Hindu festival of lights, on the outskirts of Ahmedabad, India, October 17, 2019.

A potter makes earthenware oil lamps or "Diyo" used to decorate temples and homes ahead of Tihar festival, also called Diwali, the Hindu festival of lights, in Bhaktapur, Nepal October 20, 2019.

A customer buys lanterns, which are used to decorate places of worship and homes, ahead of Diwali, the Hindu festival of lights, at a market in Mumbai, India, October 21, 2019.

Shoppers are reflected in sunglasses on display for sale at a market place ahead of Diwali, the Hindu festival of lights, in Ahmedabad, India, October 22, 2019.

A boy rides along the street decorated with lights ahead of Tihar festival, also called Diwali, the Hindu festival of lights, in Kathmandu, Nepal October 22, 2019.

A worker makes firecrackers at a factory ahead of Diwali, the Hindu festival of lights, on the outskirts of Ahmedabad, India, October 11, 2019.

Students wearing masks take part in an anti-firecrackers campaign to raise awareness about pollution ahead of Diwali, the Hindu festival of lights, in Kolkata, India October 22, 2019.