There isn’t any particular time when trees produce oxygen. Every size of tree has the facility to provide oxygen. It doesn’t concerns about time, place or anything. Trees produce within the method of making food. We humans inhale oxygen and produce CO2 . Trees need CO2 to arrange food. Trees made oxygen through the tactic of photosynthesis. The leaves of the trees pull CO2 , sunlight, and water to feed the tree. Oxygen is released from trees as a product of this reaction . One big tree can give oxygen for four people . Trees store CO2 in their fiber to scrub nature. CO2 could also be a greenhouse gas which is so negative for the environment. Research shows in one year an adult tree has ability to absorb quite 48 pounds of CO2 from the atmosphere and release oxygen in exchange. So this is often often the tactic of making oxygen. Every tree can produce oxygen at any point of some time , whether it’s day or night. Hence it’s proved that trees are the foremost important friend of mankind. So planting trees is extremely important for us to survive. The trees are taking an outsized part to urge obviate pollution within the environment. If trees don’t produce oxygen we all will die. Oxygen not only gives us life but also heals our nature in many different ways. So everytime you breathe, confine mind it’s for the oxygen that trees give us. If trees stop to supply us oxygen we all eventually die.