Image, Stock Photo A mighty oak stretches towards the sky: green, alive and beautiful.

A mighty oak stretches towards the sky: green alive and beautiful. Tree trees Oak tree Large Strong vigorously Green Nature Plant Forest Old Environment Deserted naturally Sky Tree trunk Twigs and branches Brown Growth twigs branches Leaf Change Climate change Environmental protection Environmental pollution Transience Seasons Protection Forest death Death of a tree Healthy Illness green leaves green lung Oxygen Life Tree giant Habitat nature conservation Nature reserve Force of nature Branched vivacious chlorophyll oak leaves seen from below from bottom to top photographed from bottom to top Tree in focus Vitally important salubriously