There is a German professor who is invited to China every year to study groundwater problems everywhere. Last month, before he went to China again, he told me that he would not want to go again next year. I asked him why, he said, China’s water table has been very low and low, and in many years there are no groundwater in many areas. And every time I go to study and study, I have to spend a lot of money in China, and the proposed plan is not adopted, and it can’t solve the problem. It is too embarrassing.
The professor gave me a bunch of numbers: If the resources that nature can provide to humans every year, such as energy, wood, drinking water, food, and naturally digestible garbage, set a fixed number, on December 19, 1987, humans The resources that are naturally provided to humans for one year are consumed in advance. For the remaining 12 days, human beings are overdrafting natural resources. By 1995, this day was advanced to November 21. In 2009, this day was advanced to September 24.