171k views
18 votes
Which of these substances are always harmful to

the respiratory system?
-asbestos
-pollen
-toxic chemicals
-tobacco smoke
-pollution

2 Answers

1 vote
I would say Tabacco smoke and pollution
User Yuriy Saraykin
by
3.6k points
12 votes

Answer:

asbestos

toxic chemicals

tobacco smoke

pollution

Step-by-step explanation:

User Norell
by
4.0k points