Preventing disease requires more than providing people with information to make healthy choices. While knowledge is critical, communities must reinforce and support health, for example, by making healthy choices easy and affordable. We will succeed in creating healthy community environments when the air and water are clean and safe; when housing is safe and affordable; when transportation and community infrastructure provide people with the opportunity to be active and safe; when schools serve children healthy food and provide quality physical education; and when businesses* provide healthy and safe working conditions and access to comprehensive wellness programs. When all sectors (.,.