In 1969, 88 percent of students who lived within a mile of their grade schools got there by bike or on foot. Today, less than 16 percent do. Consider the impact that has had on everything from increased obesity rates to number of gallons of gas used. So if you've got a kid in school, why not take one small step this month toward turning things around. Wednesday, October 6 is Walk to School Day so grab your kid, recruit a neighbor, leave the car in the garage, and hit the pavement.