Szukana fraza: [Abstract = "The surface areas requiring reclamation in Poland amounts 64,000 ha, of which, 44,000 ha are occupied by mining. The predominant reclaimed postmining use is forestery \(60%\). In the area of Upper Silesia, spoil heaps pose a threat to the environment, and they are often deposited on surfaces excluded from forest production."]

Wyników: 1