Walking is the only form of transportation that will not contribute to air pollution (of course if you are not a heavy smoker). Cars and trucks burn millions of barrels of oil, a non-renewable energy source, every day.
Health
Like
exercises, walking is also a cardio vascular workout that
can help reduce your risk of heart disease; aids in alleviation
of depression and lower back pain; increase your muscular
strength; improve coronary condition; reduce risks of infection
and hypertension. Walking also helps you to
lose weight
and to have perfect general health.