When buying paint to give your home's walls a refresh, understand the difference between low-VOC and zero-VOC paints. Many national brands of paint will label their paint as "low-VOC" or low in volatile organic compounds, the odor paint gives off. While it sounds healthy and green, low also means that it contains chemicals that lead to poor indoor air quality. In fact, nearly all latex paints today are considered low-VOC. What you want for the greenest choice is zero-VOC paint, which is just that: No volatile organic compounds whatsoever.