A recent letter to the editor about wood pellets caught my attention because there was a comment that differs from what I was taught in chemistry class at LSU. I learned that trees do not store carbon dioxide but release it when there is no photosynthesis (basically no daylight, water or other required conditions in the atmosphere to retain it).

I agree that trees do release oxygen when there is photosynthesis.

I believe the amount of oxygen produced generally exceeds the amount of carbon dioxide produced.

John A. Spragio

retired director of special projects, Department of Health and Human Services

Baton Rouge