Indoor air pollution from candle smoke, without proper ventilation, can affect people’s ability to focus, a study suggests.

Trim candle wicks to a quarter inch before lighting. * Treat a burning candle like a toddler. Never leave it unattended. * Keep candles at least one foot away from anything that can burn ...

But candles aren’t always convenient since they burn down and, eventually, you must replace them. So he built copper candles using a common copper pipe and an old glass jar. Of course ...