Evaluate the effect of carbon dioxide (CO₂), oxygen, and airflow on plants.

Evaluation should be made by conducting experiments, incorporating the scientific method, that involve variables in

• air quality
• CO₂ levels in plant production
• plant spacing
• air circulation
• the greenhouse effect.

Process/Skill Questions:

• What are the components of air quality in relation to plants?
• What are the effects of air pollutants such as NO_x, SO₂, O₃, on plant growth and development?
• How does CO₂ concentration affect photosynthesis?
• How does airflow impact plant growth?
• What is the greenhouse effect?
• How do C3, C4, and CAM plants respond to elevated levels of CO₂?