The best way to picture vog is to compare voggy conditions with times when the vog is not present.
Below is a series of photos that illustrate the differences, both in visibility, and in effect on plants.
Photo Gallery: Plants
Vog can sometimes be harmful to plants. Native species like uluhe (Dicranopteris linearis) and ʻōhiʻa (Eugenia malaccensis) have adapted to SO2-rich gases, but exotic plants, such as ginger and tibucinia, are susceptible to damage.