i'm carheryl jennings. from cancer to heart disease and of course, the dangers of secondhand smoke and every single day near 4,000 young people under thege of 18 smoke a cirette for the first tie. according to the centers for disease control anrevention the cdc also reports that nearly 13% of the adult population in california a currently smokers, and that is more than 3 million people. 69% of smokers in the united states doant to quit completely. the impact of sming tobacco is clearly dangerous, but a fascinating recent study suggests tobacco's hioric use in california may actuly stretch back far longer than researchers believe. it's abc 7's carolyn johnson. >> this is the type that got us all started. >> if arceologist, she's certainly fascinating by it. shspent tracing the earliest use of the people of cifornia and the pacific coast. >> tobaccon the united states was present 8,000 or 10,000 years ago and hunter gatherers probably figured out the special properties of the plant quite eay. >> she says the