composting process. compost organic waste.

abstract agriculturalconcept agriculturalillustration agriculture apple art background banner bio bioenergy biology book business care caring composicon compositingprocess composting concept cover coverdesign cycle design earth eco emblem energy environmentally fertility fruits graphic ground growing health healthy helping humanity icon illustration isolated label leaf logo logotext logotype manure modern natural naturalenergy naturalmanure nature naturecare natureemblem nitrogen organic peace plant power protect protection recycle roots save saveworld saving shape sign simple soil space symbol text tree underground unity use waste world