อภิธานศัพท์
Glossary
64
Ozone (O
3
)
Ozone is found at ground level and in the atmosphere
situated over 20 kilometers. There is a misconception about
going up on a hill or going to the beach to inhale ozone.
In actuality, inhaling ozone may make you feel good
because it kills bacteria but it can be harmful when taken
in too much. Atmospheric ozone is formed from dioxygen
by the action of ultraviolet (UV) light. Therefore, the ozone
layer protects the earth from UV radiation causing harm
to human skin, animals and plants. Ground level ozone
is caused by chemical reactions of a variety of
Volatile Organic Compounds (VOCs) and nitro-
gen oxide (NOx ) especially in the presence of
sunlight. Both substances are derived from fuel combustion
of engines, machines in factories and open burnings.
Ground level ozone is rising alarmingly and is likely to affect
people’s health. Repeated exposure to ozone is harmful
to lungs especially in children. It can also damage
the reproductive and genetic system and unborn babies.
Other complications are lung diseases, emphysema and
bronchitis, weaker immune system in the respiratory tract,
asthma,heartattacks,breathingdifficultyandpulmonaryedema.
Agricultural Holder
A holder refer to a natural person or a juridical
personwho controls, manages andmakesmajor decisions over
the agricultural holding operation. The holder is responsible
for both technical and financial matters and may undertake
all responsibilities directly, or assign the responsibilities on
a manager or a delegate.
