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Global Climate Change and Its Impacts

have frequently experienced severe droughts, resulting in crop failures, livestock deaths, and
even forcing farmers to abandon their homes. The drought from 2022 to 2023 leftnearly20
million people in East Africa facing a food crisis.
2.Floods
The South Asian subcontinent experiences severe flooding annually during monsoon
seasons, submerging vast agricultural lands, destroying irrigation systems, and causing mas-
sive casualties and property losses. The 2023 floods in India and Bangladesh affected over
40 million people, resulting in economic losses amounting to billions of US dollars.
3.Hurricanes and Other Storms
The Caribbean region and Southeast Asian countries are frequently struck by intense
tropical cyclones, which destroy crops and agricultural facilities, severely impacting the in-
come and living conditions of local farmers.
(II) Temperature Fluctuations and Growth Cycle Disruptions
Rising temperatures and seasonal variations disrupt the interrelationships between an-
imals and plants, particularly for crops reliant on specific temperature and light conditions.
Temperature fluctuations directly affect crop growth cycles and developmental rates, increase
the risk of pest and disease outbreaks, and ultimately reduce yields. For example:
【1】 Early or Delayed Flowering Times
Many fruit trees and vegetable crops in temperate regions bloom earlier in spring but
may subsequently suffer late frost damage, leading to poor fruit development or reduced
yields.
【2】 Shortened Growing Periods
Under high-temperature conditions, certain crops such as wheat and rice experience
shortened growing periods. While this may temporarily boost yields, it ultimately weakens
the crops’ stress resistance and quality over the long term.
【3】 Increased Pest and Disease Damage
Warm and humid climatic conditions favor the reproduction of pathogens and pests, in-
creasing the frequency and intensity of pest and disease outbreaks. For example, new insect
species have emerged in parts of Europe in recent years, posing serious threats to vineyards
and orchards.
(C) Changes in Precipitation Patterns and Water Resource Shortages
Climate change has led to alterations in global precipitation patterns, with some regions
experiencing concentrated and intense rainfall, while others endure prolonged droughts.
Thisunbalanced precipitation distribution poses significant water resource management chal-
lenges for agricultural production:
1.Uneven Water Resource Distribution
Traditional agricultural regions relying on stable rainfall or river water supplies face
unpredictability as these sources become increasingly variable under climate change. For
instance, parts of northwestern India and Pakistan are confronting severe groundwater deple-

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