Assessing relationships between the damage to forests due to air pollution and the development of main productional and economic parameters

abattage d'arbres air pollution analyse statistique bosques corta costos costs crop losses damage economic analysis environmental factors facteur du milieu factores ambientales farm inputs felling felling areas forests ganancias insumos agricolas mejoramiento del rodal moyen de production agricole parterre de coupe production economics profit stand improvement statistical analysis zonas de aprovechamiento