How does the climate change? What are the effects of climate change?

It mainly introduces global warming, its effects and causes; Measures to combat global warming.

Climate, a natural science term, refers to the multi-year average state of the atmosphere in a region, and the main climate factors include light, temperature and precipitation, among which precipitation is an important element of climate, so what are the effects of climate change?

1. Affect food security.

Climate change has a predominantly adverse impact on global food production. Climate change has led to an average reduction in wheat and maize yields every 10 years. The impact of climate change on China's grain is mainly manifested in many aspects, such as changes in planting structure and farming system, fluctuations in grain output, and aggravation of agricultural disasters.

In the past 30 years, due to the increase of caloric resources, the northern boundary of double cropping rice planting in southern China has been extended by nearly 300 kilometers to the north, and the northern boundary of winter wheat planting has been moved north and expanded by 20 200 kilometers to the west, which has promoted the stable and high yield of crops. However, climate change has also reduced wheat and maize yields, respectively, and increased the area of arable land affected by drought in the country.

2. Affect the security of water resources. Changes in precipitation and melting snow and ice alter the hydrological system, affecting the quantity and quality of water resources, leading to a shortage of freshwater resources. Since the middle of the 20th century, about 1 3 of the world's 200 major rivers have seen a significant reduction in river runoff.

3. Affect ecological security. Climate change has changed the geographical distribution, seasonal movements, migration patterns, and biodiversity of many biological species.

Wait. Species in some terrestrial areas move an average of 17 km to the polar regions and 11 m to high altitudes every 10 years. Climate change causes ocean acidification, affecting marine ecosystems, such as coral mortality and damage to fisheries.

Climate change has caused soil erosion, ecological degradation, and species migration in China. Northeast.

Expansion of salinized and desertified lands in the west, northwest territories.

The rate of desertification and desertification is accelerating, in the southwest.

Rocky desertification is manifesting. The productivity of grassland vegetation has decreased significantly, the scope and frequency of forest fire disasters have increased, and species have even disappeared in some areas.

4. Affect human health. Currently, the climate is warming.

This has led to an increase in heat-related human mortality and a decrease in cold-related mortality in some regions. Climate change has led to the expansion of the distribution range and seasons of many disease vectors in our country, such as malaria and dengue fever.

Yellow fever and some viral encephalitis.

That's it for the impact of climate change.

Self-aggression and human activity.

1. Natural factors: changes in natural factors such as the movement of the sun's active branches and changes in the properties of the land surface (such as changes in topography, landform, sea and land position, and latitude position caused by plate movements) will lead to climate change;

2. Human activities: the destruction of forests in order to obtain more arable land, urban building land and timber, the use of non-clean energy (such as the burning of gasoline by cars, and the indiscriminate discharge of industrial waste gases will lead to the increase of harmful gases (such as carbon dioxide, sulfur dioxide) and dust particles in the atmosphere, which will affect the global climate. One of the most striking phenomena is the greenhouse effect.

1. Glacier retreat: Glaciers are the largest freshwater reservoirs on Earth. Global glaciers are melting at the largest rate on record in more and more parts of the world due to global warming, and by the 90s of the 20th century, global glaciers are melting at an accelerated rate, meaning that millions of people will face the threat of floods, droughts and reduced drinking water.

2. Extreme climate such as blizzards, heavy rains, floods, droughts, hailstorms, thunderstorms, and typhoons are visiting the earth very frequently, which are all related to the background of global climate change. The frequency and intensity of extreme weather and climate events have increased, bringing great harm to people's lives and property. 3. Grain production reduction

Global warming is causing a reduction in food production, as droughts, water scarcity, rising sea levels, floods, heat waves and temperature upheavals are disrupting food production around the world. Most of Asia, as well as the grain belt of the United States, will become arid. In some arid agricultural regions, such as the Saharan Desert region of Africa, a slight increase in temperature due to global warming will significantly reduce the amount of food produced in the food ration section.

1. Climate change affects a variety of natural and biological systems, such as glacier retreat, permafrost melting, sea surface land rise, hurricanes, floods, and blizzards.

Droughts, forest fires.

and species extinction, as well as the prolongation of the growing season in mid- and high-latitude regions, affecting species distribution and ecosystems.

vulnerability, etc. The impacts of climate change transcend national borders and pose a threat to all living beings, including humanity itself.

2. Climate change refers to the change in the average state of the climate as measured and eliminated over time.