What harm will climate warming bring to human beings?

First of all, global warming leads to sea level rise and precipitation redistribution, which changes the current world climate pattern; Secondly, global warming affects and destroys the biological chain and food.

Chain, bring more serious natural consequences. For example, there is a migratory bird that flies from Australia to the northeast every year to escape the summer, but due to global warming, the temperature in the northeast rises and the summer is prolonged, so this bird leaves the northeast.

Time warms up accordingly, and the time to return to Northeast China is delayed accordingly. As a result, a pest eaten by this migratory bird flooded and a large area of forest was destroyed. In addition, extreme events related to the environment, such as droughts and floods, are increasing.

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2. Politics

Limiting carbon dioxide emissions is equivalent to limiting energy consumption, which will have a restrictive impact on all countries in the world. Should we "reduce emissions" in developing countries or developed countries?

"Emission reduction" has become the focus of discussion in various countries. The greenhouse gas emissions in developing countries are increasing, and the problem of "emission reduction" after 20 13 will inevitably focus on developing countries. About preventing global warming

Scientific problems will inevitably lead to problems in North-South relations, thus making the climate issue an international political issue.

3. Climate

Global warming has increased precipitation in Chinese mainland, especially in the middle and high latitudes, and reduced precipitation in some areas such as Africa. In some areas, the frequency and intensity of extreme weather and climate events (El Nino, drought, flood, thunderstorm, hail, storm, high temperature weather and sandstorm, etc.). ) have increased.

4. Ocean

With the increase of global temperature, the amount of water vapor evaporated in the ocean has greatly increased, which has aggravated the warming phenomenon. The reduction of the total heat capacity of the ocean can restrain global warming. In addition, the plankton community in the ocean is the real culprit, because the ocean releases excessive carbon dioxide into the atmosphere.

5. Crops

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Global warming has both advantages and disadvantages for crop growth. First, global temperature changes directly affect the global water cycle, causing droughts or floods in some areas, resulting in reduced crop production. Excessive temperature is not conducive to seed growth.

Secondly, the increase of precipitation will actively promote crop growth, especially in arid areas. The increase of carbon dioxide content with global warming will also promote crop photosynthesis, thus increasing yield.

6. Human health

( 1)

Global warming directly leads to superhigh temperature, heart disease and various respiratory diseases in some areas in summer, and many people die every year, among which newborns and the elderly are the most dangerous. (2) all.

Global warming leads to the increase of ozone concentration. Low-altitude ozone is a very dangerous pollutant, which can destroy human lung tissue and cause asthma or other lung diseases. (3) Global warming will also cause the spread of some infectious diseases.

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