The sun light pours over the trees branches, whose leaves produce the chlorophyll that absorbs the light energy, used to transform CO2 and H2O into O2 and carbohydrates required for growth. The leaves appear green because of the chlorophyll pigment that reflects the green wavelengths.
The picture was captured using a Nikon D40X camera with Nikon 55-200mm VR AF-S f/4-5.6G ED lens and these settings: exposure time – 1/30 seconds, focal length – 60 mm, ISO – 100, F- number – 9.