Ecology icons and visuals for ecology related presentations. Usage example: Municipal waste treatment per inhabitant (chart with pictograms). Waste treatment: Landfill, Incineration, Incineration with energy recovery, Waste-water, Composting and digestion, Chemical and medical waste. Waste prevention and waste management: Reduce, Reuse, Recycle. All symbols are as clipart pictures - fully editable in PowerPoint.