Mr. Bloomberg announced that he was donating $20 million to create a new global watchdog agency called Stopping Tobacco Organizations and Products — or S.T.O.P. — devoted to monitoring the industry’s deceptive tactics.
In a phone call with reporters before the conference, Mr. Bloomberg named Philip Morris, the makers of Marlboro, as his prime target.
Last year, the tobacco firm created a “Foundation for a Smoke-Free World” and promised to donate nearly $1 billion to it over 12 years. Tobacco companies are now marketing electronic cigarettes and devices that heat cigarettes without burning them; critics consider the foundation a ruse intended to spread the notion that those products are less harmful than cigarettes and help reduce smoking rates.
“This is an effort by Philip Morris to confuse the public,” Mr. Bloomberg said. “It’s fake science as well as fake news. Deliberately misleading governments with misinformation is just something we should not put up with.”
André Calantzopoulos, the chief executive of Philip Morris, called Mr. Bloomberg’s announcement “simply a repetition of decades-old rhetoric now being applied to the reality of 2018 by those who don’t want men and women who would otherwise continue smoking to have access to potentially better alternatives. The ultimate result is confusion amongst adult consumers, leading us to wonder who is misleading whom.”
Last year, the W.H.O. accused the foundation of being an industry front, said the agency would not partner with it, and advised governments to shun it.
The foundation’s president, Dr. Derek Yach, a former W.H.O. official who helped write the world’s tobacco control treaty, immediately fired off a letter of protest arguing that the foundation was an independent nonprofit that “fully insulated itself from the influence of the tobacco industry.”
Even before the Cape Town conference opened, its leaders announced that Dr. Yach, a South African, would be barred from attending.
Eight years, ago, Mr. Bloomberg started a $2 million global antismoking program in partnership with the W.H.O. Shortly afterward, he and Mr. Gates announced that they would jointly spend $500 million on the cause — 25 times as much as was spent at the time.
The campaign, nicknamed Mpower, urges governments to raise tobacco taxes, prohibit smoking in public, outlaw cigarette giveaways and advertising aimed at children, and offer nicotine patches and other help to smokers trying to quit.
Mr. Bloomberg said the Mpower campaign had already cut smoking rates in some countries so much that 35 million early deaths will be prevented.
The tobacco industry has filed numerous lawsuits in poor countries trying to thwart antismoking measures.
At the conference, Dr. Loida Alzona, director of health, public safety and environmental protection at the Metropolitan Manila Development Authority in the Philippines, described how her agency was defeated in court when it tried to enforce regulations outlawing smoking on transit platforms and streets.
Two men fined for smoking sued, demanding an injunction preventing her agency from penalizing anyone. They persisted even after charges against them were dropped, Dr. Alzona said, repeatedly appearing with high-priced lawyers even though they were low-paid workers.
One said later in a television interview that he was among about 50 men recruited by tobacco industry lawyers to try to be arrested in order to provoke a test case, Dr. Alzona said.