The fresh-air feeling you get from standing next to a waterfall, at the edge of the ocean, or on top of a mountain is partially due to the presence of negative ions, electrically charged particles that help neutralize pollution-generated positive ions in the air.

To roughly simulate that same state, try a natural salt lamp. Hewn from chunks of salt mined from deep inside the earth in places like the Himalayas (without environment-damaging explosives), the lamps range in color from soft pinks, oranges, and yellows to more rare blues, whites, and purples. In addition to the usual jagged hunks, they also come shaped as crosses, spheres, and hearts.