Cemeteries take up space (and only occasionally allow solar panels on graves). Cremations release emissions. But, just like yummy bits of fruit, bodies also can be freeze-dried. Then dipped in liquid nitrogen, resulting in "an organic, odourless, hygienic powder." A Scottish region is investigating this possibility out of fears that it will run out of burial space in the next few decades.
Source: popsci.comAdded: 10 March 2009