How to save and clean our planet earth for all living species?

Hi friends, For so many days there is one important question is crawling in to my mind, " Which is the best way to cremate our dead bodies of human so that it must not have any bad effect on our ecology & environment and does not occupy any piece of land on our planet Earth because this Planet Earth is meant for Living species, so what can be the best method to destroy the dead bodies of human so that it can be merged back into five elements with which it is made of ? and for your information the five elements are AIR , FIRE , WATER, SPACE AND EARTH ! AND as per per the nature , every thing which effect our ecology & environment must be merged back to the origin so First it must be converted into ashes by fire and then it must be dissolved in the water through the rivers in to the see, irrespective of any cast creed , religion, country ,communities if you really want to save your planet Earth. The places already occupied by the dead bodies on this planet must be removed and convert in to ashes and must be thrown in the see. By doing this the souls en captured in and around their past bodies will be released and will be proceeding for the transmigration for the next birth and more over our planet earth will be cleaned and better for the survival of living species Human and our co residents . thanks this is the major discussion and firm action required . Message to the world. Thanks!