Solar-powered and even water-powered alarm clocks are convenient to own, because you don’t have to worry about oversleeping due to a power outage or dead battery.Bedol makes several modern water-powered alarm clocks, and all you have to do is fill them with tap water and enjoy a pollution-free clock. Eight to 12 weeks later, you will have to refill the reservoir, but a built-in memory chip will prevent you from losing track of time. The California-based company even has a clock in the shape of a water droplet so you can flaunt your efforts of reducing your carbon footprint. Looking for a woodsy alarm clock to match your traditional or country décor? Try the Woodstation Weather Display, which is available in beech or walnut. This beautifully carved timepiece can display the outdoor weather, indoor temperature and humidity level, as well as time and calendar. When the LED display is off, this model looks like a sleek tabletop accent. If you’re more concerned about waking up gradually without having to hear a deafening beeping sound, try the Digital Zen Alarm Clock. This wood clock wakes you up with a chime progression so you don’t have to start your day off irritated. For a really natural look in the bedroom, consider a mud-powered alarm clock. If you’re a minimalist or a scientist at heart, this is the alarm clock for you. The copper and zinc cables send a flow of electrons through the soil, which in turn powers the basic LED display. This is a perfect alarm clock for kids, too. Purchasing a reusable alarm clock made from renewable materials is a fun way to green your bedside table, and every morning when you wake up, it will serve to remind you of your sustainable commitment to the planet — time doesn’t have to run out for the earth!