Most plants (by far) cannot survive the low light and dry air typical of the indoor environment. Those that can are given this symbol. Houseplants are a very special group. These are not "throw away" plants that you use for green decoration and then replace when they wither away and no longer look good. You can keep houseplants alive for decades IF you select the right kinds and give them the light and humidity they require. Remember, houseplants are living creatures.