Science, Tech, Math › Animals & Nature How Much Oxygen Do Trees Produce? Available Tree Oxygen and Human Consumption Share Flipboard Email Print Green Leaf Sunlight. Connie Coleman, Getty Images Animals & Nature Forestry Tree Structure & Physiology Tree Identification Basics Arboriculture The Science Of Growing Trees Conifer Species Individual Hardwood Species Pests, Diseases, and Wildfires Tree Planting and Reforestation Amphibians Birds Habitat Profiles Mammals Reptiles Wildlife Conservation Insects Marine Life Dinosaurs Evolution View More By Steve Nix Forestry Expert B.S., Forest Resource Management, University of Georgia Steve Nix is a natural resources consultant and a former forest resources analyst for the state of Alabama. He is a member of the Society of American Foresters. our editorial process Steve Nix Updated January 09, 2018 Trees alone can produce enough oxygen to support all human oxygen needs in North America. Trees are important and benefit the environment. A mature leafy tree produces as much oxygen in a season as 10 people inhale in a year. This quote was by an Arbor Day Foundation report. For a number of reasons, including tree availability and other photosynthetic plants, human consumption of oxygen produced just by trees can vary dramatically. There is also some question as to how many mature leafy trees are in the United States, but a rough estimate using United States Forest Service (FIA) data would be around 1.5 billion that have reached maturity (assuming they are 20 years old or older). There are approximately three mature trees for every person in the United States... more than enough. Other Tree Oxygen Estimations Here are some other quotes from different sources which may be more or less conservative than my report: "A single mature tree can absorb carbon dioxide at a rate of 48 lbs./year and release enough oxygen back into the atmosphere to support 2 human beings." — McAliney, Mike. "Arguments for Land Conservation: Documentation and Information Sources for Land Resources Protection," Trust for Public Land, Sacramento, CA, December, 1993."On average, one tree produces nearly 260 pounds of oxygen each year. Two mature trees can provide enough oxygen for a family of four." —Canada's environmental agency, Environment Canada."Mean net annual oxygen production (after accounting for decomposition) per hectare of trees (100% tree canopy) offsets oxygen consumption of 19 people per year (eight people per acre of tree cover), but ranges from nine people per hectare of canopy cover (four people/ac cover) in Minneapolis, Minnesota, to 28 people/ha cover (12 people/ac cover) in Calgary, Alberta." - U.S. Forest Service and International Society of Arboriculture joint publication. Considerations Several of these sources suggest that it all depends on the tree species and their local populations. Other things that will increase oxygen availability to humans is a tree's health and where you live when computing tree oxygen availability per person.