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Global Climate Change and Its Impacts

learning, memory, and cognitive functions. Additionally, exposure to air pollution during
fetal and early childhood stages may also impact brain development, increasing the risk of
neurobehavioral disorders later in life.
3.Reproductive and Developmental Disorders
Prolonged exposure of pregnant women to polluted environments may impair fetal
growth and development, increasing risks of preterm birth and low birth weight. Airborne
fine particulate matter and other pollutants can be transmitted through the placenta to the fe-
tus, interfering with normal physiological development. Furthermore, early-life exposure to
high levels of particulate pollution in infants may hinder immune system maturation, elevat-
ing the incidence of allergic diseases. Studies indicate that maternal exposure to high PM2.5
concentrations during pregnancy significantly increases the probability of infants developing
allergic conditions such as asthma and eczema.
4.Endocrine Disruption
Certain organic pollutants attached to particles, such as polycyclic aromatic hydrocar-
bons (PAHs) and heavy metals, possess endocrine-disrupting properties that can interfere
with hormonal balance in the human body, affecting multiple physiological processes in-
cluding reproduction and metabolism. For instance, persistent organic pollutants (POPs)
and heavy metals like lead and mercury can accumulate in the human body through the food
chain, impairing thyroid function, insulin sensitivity, and sex hormone levels, thereby trig-
gering various health issues including obesity, diabetes, and infertility.

III. Aggravation of Mental Health Issues

1.Psychological Impact of Natural Disasters
Natural disasters such as floods, hurricanes, earthquakes, and other sudden events often
cause massive material losses and casualties within a short period, inflicting intense psycho-
logical trauma on survivors. These disasters not only destroy people’s homes and property
but also disrupt daily life rhythms, leading to social disorder and a loss of personal secu-
rity. Faced with abrupt catastrophes, individuals’ psychological states undergo a series of
complex reactions, ranging from acute stress responses to long-term psychological distress,
which may even develop into severe mental disorders.
(1) Acute Stress Reaction
In the initial phase following a disaster, many individuals experience acute stress reac-
tions. This is a natural defense mechanism triggered by sudden events, manifesting as intense
emotional fluctuations and physiological responses. Common emotions include fear, help-
lessness, anger, and shock. For example, during earthquakes, people may feel overwhelming
panic due to fears of building collapses or aftershocks; in floods or hurricanes, individuals
might experience helplessness as natural forces exceed their control.
Acute stress reactions are typically transient. With the passage of time and external sup-
port, most people gradually regain normalcy. However, if these reactions persist for too long

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