What could result from tree leaves and needles being chronically exposed to air pollutants? 

A)  increased uptake of nutrients by the needles and leaves 
B)  leaves or needles that turn bright red and drop off 
C)  build up of a waxy coating on the needles or leaves 
D)  increased chance of the tree incurring damage from diseases, pests, drought, and frost

Air Pollutants

Substances in the air that can cause harm to humans and the environment.

Chronic Exposure

refers to the prolonged exposure to a potentially harmful substance or environmental condition over an extended period, often leading to long-term health effects.

Tree Leaves

Broad, flat structures on trees that are primarily responsible for photosynthesis, the process of converting light energy into chemical energy.