Ilman pilaantuminen

By Ni­pik;[Pub­lic do­main], via Wi­ki­me­dia Com­mons; Ef­fects of acid rain, woods, Ji­ze­ra Moun­tains, Czech Re­pub­lic; 7 July 2006

By Ni­pik;[Pub­lic do­main], via Wi­ki­me­dia Com­mons; Ef­fects of acid rain, woods, Ji­ze­ra Moun­tains, Czech Re­pub­lic; 7 July 2006

By Ni­pik;[Pub­lic do­main], via Wi­ki­me­dia Com­mons; Ef­fects of acid rain, woods, Ji­ze­ra Moun­tains, Czech Re­pub­lic; 7 July 2006

By Ni­pik;[Pub­lic do­main], via Wi­ki­me­dia Com­mons; Ef­fects of acid rain, woods, Ji­ze­ra Moun­tains, Czech Re­pub­lic; 7 July 2006

By Ni­pik;[Pub­lic do­main], via Wi­ki­me­dia Com­mons; Ef­fects of acid rain, woods, Ji­ze­ra Moun­tains, Czech Re­pub­lic; 7 July 2006