BEIJING, CHINA - APRIL 29: Visitors climb a staircase  on the Great Wall as they visit the popular tourist site on the first day of the May Labour Day holiday on April 29, 2023 in Beijing, China. The holiday, which lasts five days, runs until May 3.(Photo by Kevin Frayer / Getty Images)

Today's best photos: from visitors at the Great Wall of China to the Pope in Hungary



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Saturday's best photos: from 'Floating Earth' in Liverpool to Gathering of Nations

Friday's best photos: from from the Premier League to the NFL Draft

Thursday's best photos: from a new Camilla waxwork to a Base jumper in Spain

Wednesday's best photos: from a small Quran to a new Barbie doll with Down's syndrome

Tuesday's best photos: From 'Wall of Death' in Pakistan to Anzac Day in New Zealand

Monday's best photos: From bungee jumping in Beirut to falconry in Kyrgyzstan

How to protect yourself when air quality drops

Install an air filter in your home.

Close your windows and turn on the AC.

Shower or bath after being outside.

Wear a face mask.

Stay indoors when conditions are particularly poor.

If driving, turn your engine off when stationary.

Updated: April 30, 2023, 12:50 PM