Free resource with BRIEF and SIMPLE visual aids and fact sheets on sustaining the Earth.
All the files at this website are being offered under a free license, i.e. they can be downloaded and used for educational purposes worldwide for free. We update the website on a regular basis. Please feel free to check it for new materials.
Among the topics there is overpopulation, environmental abuse, changing global climate, poisoning of the air, water and soil, species extinction, etc.