The morning dawn peeps through the trees in the forestThe morning dawn peeps through the trees in the forest
The age-old tree is barely visible through the thick fogThe age-old tree is barely visible through the thick fog
The city is hidden in the fog. a city in the mountainsThe city is hidden in the fog. A city in the mountains
Непрозрачный воздух, насыщенный водяными парами, а также загрязнённый пылью, дымом, копотью и т. п..