Turfgrass—including sports fields, roadside ditches and residential lawns—makes up 40 million acres of the United States’ land surface, bigger than the entire state of New York. Collectively, all that grass plays a critical role in ecological processes such as absorbing and filtering water, sequestering carbon and providing habitat for an array of creatures. Turfgrass—including sports fields, roadside ditches and residential lawns—makes up 40 million acres of the United States’ land surface, bigger than the entire state of New York. Collectively, all that grass plays a critical role in ecological processes such as absorbing and filtering water, sequestering carbon and providing habitat for an array of creatures. Ecology Phys.org – latest science and technology news stories