Death is a certainty that accompanies us all human beings. Our current models of burial consumed expressed contempt for the land we have received in custody.

Traditionally the body has been separated from the living for hygienic reasons, but a symbolism to make sense of the absence. This explains the burial, cremation, immersion, or cannibalism. This symbology is often associated with the return to land, water, purification of fire. 30,000 years ago the burials acquire a religious character. At some point in the history of humanity arises the belief in the afterlife and the transcendent vision evolves ritual expressions that go through the embalming and mummification. The incineration indoerupeos introduced in the Iberian peninsula. With the return of Christian burial returns. Today, in Spain, for burial must be purchased burial license. Then you buy the casket or urn (if incinerated), and hires the move to the cemetery / crematorium. There are additional benefits such as aesthetics, managing the allocation of graves, the recruitment of the funeral, the mourning halls, religious or civil funeral, rental car, the publication of death notices and reminders making, book signatures, SUPPLY OF floral ornaments, gravestones and ornaments, insurance practices, and so on. In Spain it is forbidden to bury or cremate corpses without coffins. There is a third option: the grant for science or for transplantation (one excludes the other).

According to the Green Burial Council, traditional at funerals in the U.S. are used every year 82 thousand tons of steel, about 2 thousand 500 tons of bronze and copper and 1.4 million tons cement, used to maintain the shape of the tombs.

The incineration was banned in Spain by the Catholic Church until 1964. To build the first crematorium (1973) had to agree with the church hierarchy. Hygienic progress and led field approval and dissemination. Today the trend is increasing (20%), although in the West raises even reticence. Some oppose religious communities (Muslim, Jewish, Orthodox Christians), and whose precept stand before God with the whole body.

To calculate the "environmental impact" of a burning need to know that the cost of gas is enormous, as the temperature must reach 700 degrees (the human body contains 90% water) and that cremation dioxin pollutants emitted by combustion the body, synthetic upholstery internal and coffin varnishes. It is strong mercury pollution from the combustion of metals (dental prostheses and other ...) and few kilns are fitted with efficient filters as required by the European Union. The ashes are usually not a big problem, bigger problem is the abandonment of polls in seas and forests. The truth is that cremation today is not a sustainable option as responsible for 16% of air pollution and greenhouse accomplice.