all of these alternative modes of transport pollute less than at least the petroleum-powered car and contribute to transport sustainability. they also provide other significant benefits such as reduced traffic-related injuries and fatalities, reduced space requirements, both for parking and driving, reduced resource usage and pollution related to both manufacturing and driving, increased social inclusion, increased economic and social equity, and more livable streets and cities. some alternative modes of transportation, especially cycling, also provide regular, low-impact exercise, tailored to the needs of human bodies. public transport is also linked to increased exercise, because they are combined in a multi-modal transport chain that includes walking or cycling.