The age-old tree is barely visible through the thick fogThe age-old tree is barely visible through the thick fog
A lonely tree against the background of the coming nightA lonely tree against the background of the coming night
Evening landscape: mountains and lake illuminated by the night sunEvening landscape: mountains and lake illuminated by the night sun
Непрозрачный воздух, насыщенный водяными парами, а также загрязнённый пылью, дымом, копотью и т. п..