A single 400-year-old ancient oak produces 234,000 litres of oxygen a year while soaking up carbon dioxide, and can support more than 2,000 species of bird, insect, fungus, and lichen. Nature is amazing - we need more of it, not less.
@LGSpace I heard that oak trees breath out carbon dioxide at night but not in the winter because thay drop their leaves so overall they give out more oxygen than carbon dioxide. Perhaps you can clarify and does this mean evergreen trees give out equal amounts of both?