Most crematoria are fueled by gas, and while some facilities use filters or scrubbers to reduce pollutants, cremation still results in soot, carbon monoxide, and trace metals being released.
Each cremation takes 28 gallons of fuel and releases of 540 pounds of carbon dioxide. Multiply this by the number of bodies that are cremated every year in the U.S., and you have an estimate of the tons of carbon dioxide released. Because cremated remains are devoid of nutrients, your ashes cannot nourish life. You’re dust.