Negative ions are molecules that have gained an extra electron, giving them a negative charge. They are commonly found in nature, especially in places like waterfalls, beaches, and forests, where they are produced by natural processes such as water movement and sunlight. These ions are believed to improve air quality by attaching to and neutralizing pollutants and allergens. Many people claim that negative ions can enhance mood, increase energy levels, and promote overall well-being. Some products, like ionizers and air purifiers, are designed to generate negative ions indoors, aiming to replicate the benefits found in nature. However, scientific research on their health effects is still ongoing.