Human extraction of too much groundwater leads to polar drift
Science and Technology Daily, Beijing, June 19 (Reporter Liu Xia) Scientists from the University of Texas at Austin in the United States simulated how changes in the distribution of water around the earth affect the drift of the poles. The results show that the total amount of groundwater pumped by human beings from 1993 to 2010 was about 210 billion tons, and the change of groundwater distribution caused the earth's poles to drift by 80 cm...
Vitamin D deficiency is not enough, and supplementing too much is not enough
Intern journalist Pei ChenweiWith the increasing awareness of people's health, many people have begun to pay attention to supplementing various nutrients. On the internet, many people say that they "don't spend enough time in the sun" and "their bone density is not high enough", so they need to supplement extra vitamin D; But some people also believe that supplementing too much vitamin D can cause harm to the liver...