All trees (in fact, all photosynthetic plants including algae) absorb atmospheric or dissolved carbon dioxide and put oxygen back. Plants and their ancestors are the reason we're all here - without them, animal life could not exist. (It's possible that you're getting confused by plant respiration, in which plants do indeed produce small quantities of carbon dioxide, but that applies to all plants at night, not pine trees specifically.)
Sand Tree
Pine tree. It produces cones.
During photosynthesis, a pine tree takes in carbon dioxide and releases oxygen. This process occurs in the chloroplasts of the pine tree's leaves, where carbon dioxide is converted into oxygen through the energy of sunlight. Oxygen is released as a byproduct of this process and helps to replenish the atmospheric oxygen levels.
Only pinecones
Lily has leaves, pine has needles
can produce spores
Yes because they produce their own food.
A pine is a conifer tree in the genus Pinus. They are also gymnosperms and do not produce flowers. Reproduction is by male and female cones on the same tree.
The pine cones are its seed so it makes them so it can reproduce. In other words 'to make another of itself.'
The tree you are referring to is likely a pine tree. Pine trees produce cones that contain seeds and are often green before maturing and turning brown.
depends on how big the tree is the bigger the more oxygen it produces.
One mature tree can produce enough oxygen for two people in a year. So, the number of trees needed to produce oxygen for a certain population would depend on the oxygen needs of that population.