What impact will global warming bring to mankind?

1, the influence of sea level rise The sea level has risen by 14.4cm in the past century, and by 1 1.5 cm in China. The main reason for sea level rise is the thermal expansion of seawater. When the ocean warms, the sea level rises. Global warming will lead to the melting of icebergs in the north and south poles of the earth, which is also one of the main reasons for the rise of sea level. The direct impact of sea level rise is as follows: (1) lowlands are flooded: global warming makes sea level rise, and people in coastal areas have to raise flood control dams to protect people's lives and property. For example, the topography of the Netherlands is already very low, and the rising sea level has led to an increasingly embarrassing situation in the Netherlands. Many Pacific island countries, such as Tuvalu, even emigrated because of rising sea levels.

(2) Coastal erosion

(3) The salt content of surface water and groundwater increases, which affects urban water supply.

(4) The groundwater level rises.

(5) Tourism is threatened. Coastal tourism has always been very popular. Sea level rise leads to beach erosion, and the scenery is no longer; Some coastal scenic spots have been devastated, which directly affects the income of tourism.

(6) Affect the life of coastal and island residents. The coastal areas, which account for one third of the world's population, are the most economically developed areas. Sea level rise will make some economically developed island countries disappear from the ground, and some coastal cities such as Shanghai and new york will also be doomed. 2, the impact on animals and plants

Climate is the main factor that determines the distribution of biological communities. Climate change can change the adaptability of different species in a region and the competitiveness of different populations in the ecosystem. Animals and plants in nature, especially plant communities, may adapt to the speed of global warming, thus encountering bad luck. In the past, climate change (such as the ice age) made many species disappear, while some species benefited from climate warming, such as reducing natural enemies and expanding biological habitats.

3. Impact on agriculture

The distribution of temperature and precipitation in a year is the main factor to decide what crops to plant. The change of temperature and precipitation caused by temperature will affect the yield of food crops and the distribution type of crops. Climate change has led to significant changes in biota and its spatial (latitude) distribution. For example, climate warming enabled Norway to grow corn, and then the interglacial period made corn disappear in Norway. In addition, global warming will aggravate natural disasters such as high temperature, heat wave, tropical storm and tornado. Therefore, after the global temperature rises, the stability and distribution of world grain production will change greatly.

4. Impact on human health

Human health depends on a good ecological environment, and global warming will become the main factor of human health in the next century. Extreme high temperature will become a human health problem in the next century, becoming more frequent and common, which is mainly reflected in the increase of morbidity and mortality. In particular, some infectious diseases will endanger tropical regions and countries, and some diseases that mainly occur in tropical regions at present may spread to mid-latitude regions with climate warming.