What caused the melting of glaciers? What caused the glaciers to melt?

1, climate warming. As humans continue to cut down forests and burn fossil energy such as oil and coal, greenhouse gases such as carbon dioxide produced on the earth exceed their self-purification load. These greenhouse gases have a strong permeability to visible light emitted by the sun, but they have a strong absorption to long-wave radiation emitted by the earth, and they can strongly absorb infrared radiation emitted by the ground, which leads to an increase in the temperature of the earth and an intensification of the greenhouse effect. Under the influence of global warming, glaciers are melting at an extremely rapid rate in recent years. Glaciers are supplemented by natural snowfall to maintain their dynamic balance, which reflects the balance of income and expenditure of glacier accumulation and melting. If the bad weather continues, glaciers will continue to shrink and melt.

2. Human factors. In addition to natural climate factors, another main reason for the rapid melting of glaciers is population expansion. Due to human overgrazing, over-reclamation, deforestation, indiscriminate exploitation of Chinese herbal medicines and groundwater, the speed of glacier retreat has been greatly accelerated. With the development of society, the population has doubled, but the cultivated land area can't increase accordingly. The contradiction between man and land led to three large-scale deforestation and land reclamation in northwest China in the 20 years after the founding of New China. Take Gansu Province as an example. By the end of 1990s, the area of soil erosion in Gansu Province accounted for 85.6% of the total area, and the sandstorm weather increased obviously, which further aggravated the glacier shrinkage.