Are Masks Enough While Running Marathon in Beijing Smog?

The video discusses the Beijing Marathon, highlighting that some runners wore masks due to the black haze. It describes the air quality in Beijing as officially hazardous.

What event is being discussed in the video?

• New York Marathon

• London Marathon

• Beijing Marathon

• Tokyo Marathon

What did some runners wear during the marathon?

• Gloves

• Sunglasses

• Masks

• Hats

Why did the runners wear masks?

• To protect from rain

• To avoid sunburn

• To shield from the black haze

• To enhance performance

What does the video describe as 'officially hazardous'?

• The crowd size

• The marathon route

• The air quality

• The temperature

Where is the hazardous air quality being observed?

• Beijing

• Seoul

• Shanghai

• Hong Kong