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4. Consider the following chemical events:
(1) Burning garbage in the yard.

(2) Covering the ground surface by plastic waste.
(3) The use of nickel catalyst in the manufacture of margarine.

(4) The formation of oxygen gas in the photosynthesis reaction.
(5) Formation of ammonia gas in the decomposition of organic

substances in rivers.

Chemical events that correspond to the concept of green chemistry
are indicated by the number . . .

a. (1) and (2)
b. (1) and (3)

c. (2) and (4)

d. (3) and (4)
e. (3) and (5)

5. One of the causes of the increase in the earth's temperature (global

warming) is human activities that do not support the principles of
green chemistry, such as the uncontrolled use of fossil fuels in

motorized vehicles. Based on these facts, it can be concluded that the
main cause of global warming is high levels of . . . in the atmosphere.

a. Water vapor
b. Ammonia gas

c. Oxygen gas

d. Carbon dioxide gas
e. Nitrogen dioxide gas

6. Reducing the use of fossil fuels and developing pesticides that are safer
for the environment make big changes are examples of green chemistry

principles....
a. Safer solvents and auxiliaries