Come to think of it, walking is ecology friendly. The periodic oil price hike does not adversely affect it. When you walk, you do not have to worry about your gasoline expenses nor will the traffic aids give you a ticket for over-speeding. All of these will be out of your worry.
By walking more, you’ll not add to the huge traffic problem in the vehicle-infested streets of the burgeoning cities. Even how accident-prone you might be, you will perhaps not collide very often with your fellow pedestrians.