The World Health Organization indicated that tobacco use is the most preventable cause of cancer worldwide. Globally, more than 7 million people die each year from causes associated with tobacco use and tobacco-related diseases. Despite recent trends that show falling rates for U.S.-based smokers, much work still must be done. Oncology nurses around the world can make a difference by engaging in prevention and treatment tactics, working with policymakers, and educating their communities and patients about tobacco control.