Some symbols are given below. Explain those symbols. Which disasters may occur if those symbols are ignored?

a. Caution road sign: Road accident may occur if this symbol is used.

b. Dangerous chemicals: lab accident may occur if this symbol is used.

c. Falling of trees: Road accident may occur if this symbol is used.

d. Not allowed: accident may occur if this symbol is used.

e. Wash hands after using chemicals: lab accident may occur if this symbol is used.

f. Flammable gas: Major accident may occur if this symbol is used.

g. Catch fire: Fire accident may occur if this symbol is used.

h. Explosives: Major accident may occur if this symbol is used.

i. Exposure of gas: Fire accident may occur if this symbol is used.