Where is the negative oxygen ion value higher in nature? ,

The better the general environment, the higher the air quality and the higher the content of negative oxygen ions. For example, the content of negative oxygen ions in forests, seashores, waterfalls and streams is relatively high. This is why most nursing homes are located in forests and seaside. In addition, after the rain, especially after the thunderstorm, we will obviously feel the air is fresh, because the air will contain high concentration of negative oxygen ions after the rain.