I buy Enviro-Log firelogs at Home Depot, but you'll have to check availability in your area. They can also be purchased from the Web site, http://www.enviro-log.net
and I believe they list other retailers on the site. They're made of 100 percent recylcled waxed cardboard - the cardboard used by grocery stores for produce. The wax is a food grade wax found on your fruits and vegetables. The product burns cleaner than wood and generates more heat than wood per pound. Enviro-Log's claims have also been validated by Omni Testing Lab. A friend told me about these. Burned a case last month and love em.