In the modern funeral industry, cremation urns of varying quality, elaborateness, and cost are offered, and urns are another source of potential profit for an industry concerned that a trend toward cremation might threaten profits from traditional burial ceremonies. Biodegradable urns are sometimes used for both human and animal burial. They are made from eco-friendly materials such as recycled or handmade paper, salt, cellulose or other natural products that are capable of decomposing back into natural elements, and sometimes include a seed intended to grow into a tree at the site of the burial.