Czechoslovakia - the Problem of drinking water.
Construction of water supply in the Tree and Nitra and water in Slatinka with the use of groundwater.
Poland - Petrochemical plant in Plock.
Special cleaning effluents of phenol.
Germany-Environmental pollution: landfills of garbage, cans.
Air pollution - exhaust fumes and smoking pipes.
The discovery of ecological chemistry.
Experiments on environmental protection.
Waste recycling plant-waste incineration.
Water treatment in wastewater treatment plants.