: Vital for photosynthesis but a contributor to the greenhouse effect. Noble Gases and Water Vapor : Trace amounts. 2. Photosynthesis and Respiration
If your teacher hasn't provided the marking scheme yet, you can:
Acid rain, respiratory issues, and the enhanced greenhouse effect. Tips for Completing Workbook 2B Chapter 9
Chapter 9 frequently dives into the gaseous exchange in plants and animals. You will likely encounter questions regarding: How nature balances O2 and CO2.