单项选择题

Most Canadians drive their cars to get to work. Aron Myers, ______, has a special passion for walking. Aron has demonstrated the need to help people see the benefits, both environmentally and physically, of walking. He orchestrated the "Walk-to-Work Day," the national committee that encouraged thousands of people ______ to work wherever possible.
He firmly believes that if walkers can manage the distances, walking more regularly will provide lasting health benefits as well as solve unnecessary traffic ______ in local towns and cities.