Answer to Question 1
Harmful respiratory substances are, dust, asbestos, carbon monoxide, refrigerants, resins, adhesives, and solvents.
Answer to Question 2
Only use CSA or ANSI-approved ladders. Maintain ladders in good condition. Inspect ladders before each use and discard ladders needing frequent repairs or showing signs of deterioration. All portable ladders must have no slip feet. Place ladders on a firm footing, no farther out from the wall than one quarter of the height required. Ladders must be tied, blocked, or otherwise secured at the point where the ladder meets the building to prevent them from slipping sideways. Never overload a ladder. Follow the maximum carrying capacity of the ladder, including the person and equipment. The American National Standards Institute
Structures of the respiratory tract.
The respiratory system
Example of Tabular List organization levels and formatting.
Cultures Ideal Body Types
The respiratory system.
Major Vitamins List