What harm will global warming bring to people?
1. Sea level rise
About one-third of the world’s population lives within 60 kilometers of the coastline, with developed economies and dense cities. The expansion of ocean water bodies and the melting of polar ice and snow caused by global climate warming may cause sea levels to rise by 50 centimeters in 2100, endangering coastal areas around the world, especially those densely populated and economically developed estuaries and coastal lowlands.
These areas may be subject to inundation or seawater intrusion, beach and coast erosion, land deterioration, seawater intrusion and flooding, port damage, affecting coastal aquaculture, and damaging water supply and drainage systems.
2. Climate
Global warming has increased precipitation in continental areas, especially in mid- and high-latitudes, and decreased precipitation in some areas such as Africa. The frequency and intensity of extreme weather and climate events (El Niño, drought, floods, thunderstorms, hail, storms, high temperature weather, sandstorms, etc.) are increasing in some areas.
3. Ecology
Global warming has caused sea levels to rise and precipitation has been redistributed, changing the current world climate pattern; this has also indirectly brought consequences to the biological chain and food chain. More serious natural consequences.
For example, there is a migratory bird that flies from Australia to Northeast China every year to spend the summer. Global warming has increased temperatures and lengthened summer. The time it takes for this bird to leave Northeast China is correspondingly extended, and its return time is also delayed. , causing a pest eaten by this migratory bird to become rampant and destroy the ecology. There will also be the occurrence of extreme weather conditions such as droughts and floods.
IV. Farming
The distribution of temperature and precipitation in a year is the main factor that determines what crops to plant. Changes in temperature and precipitation caused by temperature will affect the quality of food crops. Yield and crop distribution type. First, global temperature changes directly affect the global water cycle, causing droughts or floods in some areas, resulting in reduced crop yields, and too high temperatures are not conducive to seed growth.
Second, increased precipitation, especially in arid areas, will actively promote crop growth. The increase in carbon dioxide levels associated with global warming will also promote photosynthesis of crops, thereby increasing yields. Third, the increase in temperature will help increase the yield of crops that love humidity and heat in high latitudes.
5. Politics
Global warming is the result of human emissions of fuel. Limiting carbon dioxide emissions is equivalent to limiting energy consumption, which will definitely restrict countries around the world. Sexual impact, "emission reduction" has also become a focus issue between developing and developed countries. Scientific issues related to preventing global climate warming will inevitably trigger the issue of "North-South relations", thus making the climate issue an international political issue.
6. Human health:
Human health depends on a good ecological environment. Extreme high temperatures will become more frequent and common problems for human health in the next century.
Mainly reflected in the increase in morbidity and mortality, especially infectious diseases such as malaria, lymphatic filariasis, schistosomiasis, hookworm, cholera, meningitis, kala-azar, and dengue fever, which will endanger tropical areas and Some diseases that currently occur mainly in tropical areas may spread to mid-latitudes as the climate warms.