The cremation process requires combustion provided by an electric arc over natural gas. Fans are used to ensure that oxygen is fed into the unit at the correct rate to ensure efficient burning takes place. The process takes approximately 3 hours and only one person is cremated at a time. As each cremation is completed, heat is retained in the bricks of the cremator. Therefore the more cremations that take place in a day, the more efficient the cremator becomes.
Modern crematoriums and cremators use better technology than their predecessors. The cremator technology of a modern crematorium ensures all exhaust gasses are re-ignited to ensure that the discharges to the atmosphere are kept to a minimum. You may wish to check that the crematorium that you are using is not one which emits smoke on combustion. This is a clear sign that it is using old technology. Crematoriums should operate with no odour, no smoke, and no noise emitted to the environment around it.
All embalming chemicals are completely destroyed by the cremation process. No plastics are cremated so pollutant emissions are kept to a minimum, whether you choose an eco-friendly funeral option or not. The modern cremator is cleaner burning than most wood burners operating in domestic homes.
Cremation does use scarce energy resources (natural gas) and contributes to the production of greenhouse gases. However modern, properly operated crematoria do minimize this impact.
Ashes will be returned to you in a urn; most urns are made of plastic. You may however request that the ashes be returned in a Radiata Pine Urn or a cardboard box wrapped in recycled paper.
Other urns are available, these are made of metal, resin products, customwood with vinyl veneer, or solid wood.