Final answer:
Chronic exposure of tree leaves and needles to air pollutants can c. reduce photosynthesis, ultimately affecting the overall health and productivity of the trees.
Step-by-step explanation:
Chronic exposure of tree leaves and needles to air pollutants can c. reduce photosynthesis.
Air pollution can damage the photosynthetic apparatus in plants, leading to decreased photosynthetic rates and impaired growth. This can ultimately affect the overall health and productivity of the trees.