Hand-me-downs. Cold pizza for lunch. Last night's lasagna for breakfast. Defrosted wedding cake on your one-year anniversary. What's not to love about leftovers? And, as much as they can satisfy cravings, they will also satisfy plants! If you have houseplants, whenever possible give them a good pour of water that is left over from drinking and cooking. Obviously, you don't want to over water your plants (black thumb!); so, if it's not yet time to use that leftover water, why not store it in a jar rather than pour it down the drain? Repurposing and conserving water is certainly eco. And even better — the nutrients left over from boiling or steaming veggies will provide an added vitamin boost to your plants. What's not to love?