An aerial view of Swayambhunath Stupa is pictured on a smoggy day as the air pollution reaches hazardous level, in Kathmandu, Nepal on Wednesday, April 7, 2021.

A view of the Boudhanath Stupa pictured from a window of a restaurant in Kathmandu, Nepal on Wednesday, April 7, 2021. 

Officials from the Zoo carry a cage with a tiger inside at the Central Zoo, brought from Bardiya National Park after it fatally killed Policeram Tharu, a 31-year-old mahout involved in the rhino count in Lalitpur, Nepal on Tuesday, April 6, 2021.  

A tiger is sighted inside its new enclosure at the Central Zoo, brought from Bardiya National Park after it fatally killed Policeram Tharu, a 31-year-old mahout involved in the rhino count in Lalitpur, Nepal on Tuesday, April 6, 2021.  

People tour the Swayambhunath Stupa as haze engulfs Kathmandu valley yet again as the air pollution fluctuates between unhealthy level and hazardous level, in Kathmandu, Nepal on Tuesday, April 6, 2021. 

Activists are arrested by the police during a demonstration to declare climate emergency and public health emergency in front of Singadurbar, the resides the office of the Prime Minister and other Ministries in Kathmandu, Nepal on Friday, April 2, 2021. 

A vendor covers herself inside a plastic sheet during rainfall at Basantapur Durbar Square, a UNESCO World Heritage Site in Kathmandu, Nepal on Wednesday, March 31, 2021. 

Haze engulfs Kathmandu valley as the air pollution increases to hazardous levels in Kathmandu, Nepal on Monday, April 5, 2021. Wildfires in many parts of the country during this dry season are causing the smog in the valley.

Nepalese locals of Bhaktapur stage a protest against the government after they ordered the locals not to organize the annual Biska Jatra (Bisket Festival) on the occasion of New Year due to fears of the second wave of Covid-19 pandemic in Bhaktapur, Nepal on Monday, April 5, 2021.

Nepalese locals of Bhaktapur stage a protest against the government after they ordered the locals not to organize the annual Biska Jatra (Bisket Festival) on the occasion of New Year due to fears of the second wave of Covid-19 pandemic in Bhaktapur, Nepal on Monday, April 5, 2021.

Activists stage a global climate strike march against climate induced disaster in Kathmandu, Nepal on Friday, March 19, 2021.

A child gets ready to perform rituals during Hyolmo Tsechu prayer ritual festival celebrated by the Hyolmo community at Hyolmo Monastery in Kathmandu, Nepal on Tuesday, March 23, 2021. Prayers and celebrations are held annually for peace, harmony and prosperity. 

A masked dancer perform traditional Chaym dance during Hyolmo Tsechu prayer ritual festival celebrated by the Hyolmo community at Hyolmo Monastery in Kathmandu, Nepal on Tuesday, March 23, 2021. Prayers and celebrations are held annually for peace, harmony and prosperity.

A priest perform traditional rituals during Hyolmo Tsechu prayer ritual festival celebrated by the Hyolmo community at Hyolmo Monastery in Kathmandu, Nepal on Tuesday, March 23, 2021. Prayers and celebrations are held annually for peace, harmony and prosperity. 

Members of the Bahraini royal family workout at the gym before their Mt. Everest expedition led by Prince Sheikh Mohammed Hamad Mohamed Al Khalifa at Hotel Marriott in Kathmandu, Nepal on Friday, March 26, 2021.

A woman plays on a swing on a polluted day on the outskirts of Kathmandu, Nepal on Saturday, March 27, 2021. 

Revelers with vermillion colors on their faces celebrate Fagu Poornima “Holi” festival also known as the carnival of colors in Kathmandu, on Sunday, March 28, 2021. 

Revelers wearing face masks as a protective measure against the spread of COVID-19 celebrate Fagu Poornima “Holi” festival also known as the carnival of colors in Kathmandu, on Sunday, March 28, 2021. 

An aerial shot of Dashrath Stadium is pictured during the opening game between Bangladesh and Kyrgyzstan Under-23 competing for the Three Nations Cup 2021 tournament in Kathmandu, Nepal on Tuesday, March 23, 2021.