Original sentence: Final disposal is therefore not urgent.The Australian Synroc (synthetic rock) is a more sophisticated way to immobilize such waste, and this process may eventually come into commercial use for civil wastes (it is curently being developed for US military wastes)
Edited sentence: Considering that no human known material or container can withstand the common (HLW) radioactive radiation for more than 300 years and considering that the typical half-life is 4,000,000,000 years and more, humankind has to admit, that basically there is no safe way for a secure burial.Final disposal is therefore not urgent and, as discribed in the beginning, technically and politically still impossible.However, the current generation (and our economic system) does not have to pay the real costs of any planned 'secure' burial.The Australian Synroc (synthetic rock) is a more sophisticated way to immobilize such waste, and this process may eventually come into commercial use for civil wastes (it is currently being developed for US military wastes).This explains why the search for a final repository (see below) turns out to be so complicated