Next time you're dusting your house, don't forget to give those plants a good dusting too! Your houseplants don't just need their leaves to turn sunlight into energy — they actually "breathe" through them as well. If their leaves become too dusty, they're unable to absorb the oxygen, turning your once-healthy plant into a sickly one. Make sure to keep the leaves clear of dust as often as possible — and a light mist of water isn't a bad idea either!