In the 1950s, my country's forest coverage rate was 19%, in the 1960s it was 11%, in the 1970s it was 6%, and in the 1980s it was less than 4%  With the decrease in forest coverage year by year, the vegetation was greatly destroyed, which weakened the land's impact on rainwater  The effect of arresting, a heavy rain, the water rolls and the sand rolls down, making the floods serious year by year
It can be seen that the destruction of forest resources is the cause of the floods
Cotton is a plant fiber, loose and porous, and can keep warm. Snow is formed by the freezing of water, with 40% to 50% of the air gap, and it is also loose and porous, which can keep heat. It can be seen that loose and porous are the reason for heat preservation