We also know that inhaled DDT in cigarette smoke stays inside the body tissues and doesn’t get exhaled or excreted unless there is radical weight loss, because it’s stored in fat cells that it causes the body to make. That’s the link to obesity. Those same 1960s studies looked at the amount of DDT exhaled and it turned out to be virtually none. You can browse a few examples of the surviving tobacco/cigarette pesticide research that virtually ended in the 1970s here and here and here and here and here.