There are a lot of advantages to green gardening, including conserving resources, reducing yard waste and protecting the quality of local streams and lakes. To encourage green gardening, Seattle is joining a handful of cities in offering its residents big savings on high-quality compost bins. By offering the discounts, the city is hoping to make it easier for Seattleites to garden in a more natural way while building healthier soils. The two compost bins available include a green cone food-composting bin that turns food scraps into nutrient-rich compost and a yard-waste compost bin, which transforms discarded plant waste into a natural soil builder. The bins respectively cost about $100 and $70 each, but Seattle residents can purchase each for $25 from the city. Residents can also purchase a rain barrel for $65, which lets gardeners capture Seattle's spring and summer rains for watering their gardens.