Answer:
yes
Step-by-step explanation:
clean air (oxygen) is vital for humans because we cannot breathe without it. In 1952, there was the Great Smog of London and over 150,000 people had to go to the hospital and more than 12,000 died. They were inhaling the deadly smoke and pollutants in the air. This is also a problem in china and some other countries. This is why people wear masks to protect their lungs.