Harm of carbon emission

Because people burn fossil fuels, such as oil and coal. Or cutting down and burning down forests will produce a lot of carbon dioxide, that is, greenhouse gases, which have a strong permeability to visible light emitted by the sun, a strong absorption to long-wave radiation emitted by the earth, and a strong absorption of infrared radiation from the ground, leading to an increase in the temperature of the earth, that is, the greenhouse effect.

2. Melting of glaciers and frozen soil

The main effect of glacier melting is that glaciers melt into the ocean, leading to sea level rise. Recently, major media have also released the news that sea level rise will cause more than 3,000 cities around the world to be flooded. This news is wrong. Glaciers will never melt completely, and the earth has its own feedback system.

Secondly, the melting of glaciers will also reduce the reserves of solid water resources, resulting in water shortage. In this regard, China's arid areas are greatly affected, such as southern Xinjiang. Agriculture and animal husbandry mainly rely on the melting water of snow-capped mountains, and the Tarim River and Hexi Corridor also mainly rely on glacier supply.

There are also studies that the melting of glaciers will release viruses and bring devastating disasters to mankind. Researchers have found that ice cores drilled from polar regions contain ancient viruses, which are still alive after tens of millions of years. They believe that polar glaciers are the greatest treasure house of ancient viruses, and once all glaciers melt, these viruses may be released, causing unprecedented disasters to mankind.

3. Sea level rise

The sea level changes with the volume of ocean basin or the volume of seawater in the ocean. Sea level can rise or fall, and there are different erosion datum levels around the world. The datum plane is defined here as the surface where sediments can only exist temporarily and be eroded.

In recent 100 years, the sea level has generally shown an upward trend. According to the observation statistics of 1880 ~ 1980, the sea level rose by 14cm on average. The United Nations Environment Programme, the World Meteorological Organization and the World Federation of Science predict that the global sea level will rise by 20 ~ 140 cm around 2030.

4. Threatening human food supply and living environment.

Global warming and the decline of groundwater level will become the direct cause of global food supply shortage, which is reflected in the rising trend of global rice prices. According to statistics released by the US government, the price of rice rose by 30%, reaching $260 per ton, although the global grain harvest and the prices of wheat and corn had declined.

According to the research report published by the National Academy of Sciences, the abnormal temperature increase during the rice growing season will reduce the harvest. In addition, the decline of groundwater level and the depletion of wells in many parts of the world will also affect food production.