A "natural cemetery," "eco-cemetery," "green cemetery" or "conservation cemetery", is a new style of cemetery as an area set aside for natural burials (with or without coffins). Natural burials are motivated by a desire to be environmentally conscious with the body rapidly decomposing and becoming part of the natural environment without incurring the environmental cost of traditional burials. Certifications may be granted for various levels of green burial. Green burial certifications are issued in a tiered system reflecting level of natural burial practice. Green burial certification standards designate a cemetery as Hybrid, Natural, or Conservation Burial Grounds.