Inside, it is often dirtier than outside. Gerbera, rubber plants, and palms are more than just decorative eye-catchers. As early as the 1980s, NASA's Clean Air Study revealed that many plants filter dust and pollutants from the air, thereby improving indoor air quality. Discover the 50 best air-purifying and refreshing plants, learn what they combat, and find out how to effortlessly integrate fresh greenery into all living spaces.