Green Spans is a term used to describe the combination of LAWNS and leas, which are both green spaces. LAWNS are areas of grass that are kept short and even, usually with a mower or other cutting device. Leas are open fields, often used for grazing animals, that are not usually mowed. Together, LAWNS and leas create a green span, which can be used for recreational activities such as walking, running, and playing sports.