These are some of America's biggest killers:

AIDS. Auto fatalities. Murder.

But a new advertising campaign by anti-tobacco teens and a local ad agency emphasizes that a bigger killer is lurking out there: tobacco.

The dangers of tobacco are being proclaimed on billboards, radio, television and in print in a $50 million, two-year youth anti-smoking drive. The money comes from last August's $11.3 billion settlement between Florida and tobacco companies.

Each medium in the campaign carries a different type of message. But the billboards, which first appeared in Miami-Dade this month, are raising some eyebrows.

Using statistics compiled by the campaign, they show on a scoreboard that there were 430,700 tobacco-related deaths in 1995, compared with 43,363 auto fatalities, 43,115 AIDS-related deaths and 22,895 murders for that year.

``These ads are straight and to the point,'' said Alexandra Drouin, 17, the Miami-Dade spokeswoman for ``The Truth Campaign.''

``Teens need to know we've been lied to,'' Drouin said. ``We don't want to sugar-coat things.''

The billboards are prominently displayed along State Road 826, Biscayne Boulevard, and South Dixie Highway. Thousands of cars drive by those billboards every day.

``I think it's awesome,'' said Fatima Romero, 18, who doesn't like her friends to smoke around her. ``Maybe it will make people see how they are affecting other people, too.''

Daniel Belcarries, 13, said the billboard won't affect him much.

``I don't smoke, and I don't hang around any people that smoke,'' he said.

Executives at Crispin, Porter and Bogusky, the Coconut Grove ad agency responsible for the ads, say the campaign is aimed at getting children and teenagers not to smoke. They say they designed them with heavy input from Florida teens.

The billboards are part of a cutting-edge tactic to get youths to realize how the tobacco industry has been deceiving them, the executives say. On television and in radio ads, teens speak out directly about how tobacco companies tricked them into the world of cigarettes.

``We found out that the teens were tired of the `Don't-do-that campaigns,' '' said Jeff Hicks, the firm's president. ``They already knew that smoking was bad for them, but they didn't know how the tobacco companies targeted them and manipulated them.''

Crispin, Porter and Bogusky is under a ``performance compensation'' contract, which means the firm must produce positive results for its pay. A third independent research company will gauge the effects of the campaign every quarter, Hicks said.

``When you see 430,000 deaths, it makes you stop and say, `Wait a minute,' '' Hicks said.

But Alberto Avendano, education director at Health Crisis Network, a nonprofit HIV services agency, wishes for a more united campaign.

``The message should be: `These are two reasons to be protecting yourself,' '' Avendano said. ``The scaring campaign doesn't work. We should just fight for a healthier society.''