Nature protection and production
Every branch of production affects the environment. When fuel burns and in industrial waste, harmful gases enter the atmosphere, untreated wastewater pollutes water bodies, waste damages the soil, and noise harms plants, animals and human health. To clean the air, gas cleaners, dust traps and filters are used; in water treatment plants wastewater is neutralised by chemical and biological methods, settled and filtered through sand or gravel, and using water in a cycle (reuse) saves it. Mining damages land, so damaged land must be restored; in farming wrong irrigation and fertilisers can lead to soil salinisation, erosion and poisoning of water; the drying of the Aral Sea is an example of the results of not using water resources wisely. Complex processing of raw material reduces waste: from wood waste cardboard, fibreboard and particleboard are made. The most advanced way is waste-free and low-waste technology. Everyone should keep their yard, neighbourhood and school clean, throw rubbish in designated places, plant and look after trees and not burn fallen leaves.
School eco-walk: groups observe where rubbish is thrown in the schoolyard and whether water or electricity is wasted; conclusions are made as a poster. Gloves are worn when collecting rubbish, sharp and glass items are not touched and adults help.