Learning Task 1: Write FACT if the statement is correct and BLUFF it if is incorrect. Write your answer on a sheet of paper. 1. Trees are man's source of food. 2. Trees are source of carbon dioxide 3. Many trees cause pollution. 4. Trees intake carbon dioxide from air and breathe out fresh oxygen for our life support. 5. The roots of the tree hold the soil and water preventing soil from erosion.​