Which elements do plants obtain from the air?

Plants primarily obtain carbon (C), hydrogen (H), and oxygen (O) from the air. Carbon dioxide (CO2) is a key component that plants absorb during the process of photosynthesis, allowing them to produce glucose and release oxygen. The hydrogen and oxygen components primarily come from water, which is taken up through the roots, but in the context of atmospheric sources, oxygen from air contributes to the air composition that plants utilize in their metabolic processes.

This understanding highlights the essential role these elements play. Carbon is the fundamental building block of organic molecules, while hydrogen and oxygen are integral to the formation of water and carbohydrates, both crucial for plant growth and energy storage.