The natural alternative is to burn either natural beeswax candles or vegetable-based soy candles. Either of these alternatives will spare you from showering your home with a nasty, sooty chemical residue. Soy candles are non-toxic, biodegradable and are a renewable resource. Beeswax may be a bit pricier, but just as easy on the environment. Purchase your candles from reputable sources, and buy 100-percent soy or 100 percent beeswax with cotton wicks, and enjoy the beautiful flickering light.
There are also many flameless (battery-operated) candles available now, some of which are scented. They can be purchased at many home stores and online. We like the flameless timer candles, which turn on and off at the same time every day!