E$-$Lecture question #$5$: Watch the

video $$The air we breathe: Mark

Turrell at TEDxBerlin$$ and answer

the following questions:

a$)$ How many liters of air does a

person breath per minute on

average?

b$)$ Name three major sources of air

pollution mentioned in the video.

c$)$ What does Mark Turrell believe

are the $3$ steps to making a

difference in air pollution? Please

describe each step in a sentence

or two each.