Szukana fraza: [Abstract = "In order to reduce negative impact on environment while conducting various works in forests it was decided to use for lubrication of chain saws biodegradable oils. It is forbidden to use fire during works in forests. Workers are obliged to break up branches left on felling sites. Atmore and more areas is used partial felling what positively influences specific, age and spatial differentiation of forest stands. Woodsmen heartily commit into enterprises related to active protection of imperilled species and their biotopes."]
