There are nearly 4 million acres of residential turf in the State of Florida. One tree removes 26 pounds of carbon dioxide from the air each year and can produce enough oxygen—about 13 pounds—for a family of four to live on. Floridians spent $5.3 billion on landscaping services in 2005. Residential irrigation systems can account for 22% - 67% of the total household water consumption annually. Proper selection and placement of plant material can lower heating and cooling costs by as much as 20%. Landscaping can add as much as 14% to the resale value of a building and speed its sale by as much as 6 weeks.