The most serious environmental and ecological problem facing the world today should be global warming. With the climate change, drought has become one of the factors restricting the development of agriculture. The loss of global agriculture caused by drought is increasing year by year. Drought has a great impact on agricultural production, global food security and sustainable development.
On June 17, the UN Office for disaster reduction released the global disaster risk assessment (GAR) 2021 drought special report and pointed out that so far this century, drought has had a direct impact on the world's 1.5 billion people, affecting more people than other slow-moving disasters. It is urgent to prevent and solve the global drought problem.