Negative ion generators are devices that produce negatively charged ions, which are believed to improve air quality. These ions attach to positively charged particles, such as dust, pollen, and smoke, causing them to clump together and fall to the ground. This process can help reduce allergens and pollutants in the air, making it cleaner and potentially healthier to breathe. Many people use negative ion generators in their homes or offices to create a fresher environment. Some studies suggest that these devices may also enhance mood and reduce stress, although more research is needed to fully understand their effects on human health and well-being.