Despite the scientifically established harmful health effects of smoking, millions of people around the world still do it. Because of this, many large companies are looking for healthier ways to deliver active ingredients from tobacco and cannabis to people with a smoking habit. More than a billion people around the world smoke tobacco or cannabis, leading to 6 million deaths a year. Companies in the tobacco and cannabis sectors are looking for alternative delivery systems. Some alternatives may be more effective - and healthier - than smoking.