A natural and efficient way to purify the air inside your home is through indoor plants. But if your plants get sick -- you'll see white or black mold spores on the outside of the leaves -- they can also contribute to an unhealthy air environment. For sturdy plants, wipe down the leaves with a damp microfiber towel to pick up the mold spores, then wash the cloth in hot water to sanitize it. For more delicate plants, rinse them clean with cool water in a deep sink or bathtub. Let the plant drain and air-dry, then return it to a sunny spot in your home.