I put an x-box power saver in my house. It reduces carbon emmisions that harm the environment and I get the bonus of a reduced electricity bill! The company also offers a room oxygenator. It cleans the air in my home. The whole house smells like the fresh outdoors, which is so much better than adding fragrance on top of household odors.
Andy has more info than I do about this - here is his web site:
Drop him a line and let him know I sent ya!