(CNN) Michael Bloomberg signed a bill Monday to regulate the use of electronic cigarettes one of 22 bills he signed at City Hall that are the last he will sign as mayor of New York City, according to Evelyn Erskine, his deputy press secretary.

The legislation amends the Smoke Free Air Act, which bans smoking in public places such as restaurants, bars, parks, beaches and places of employment. It now additionally prohibits the use of electronic cigarettes in all areas where smoking is prohibited.

E cigarettes will still be permitted in areas where smoking is allowed, in addition to retail e cigarette stores and vapor lounges.

E cigarettes are “battery operated products that turn nicotine, which is highly addictive, and/or chemicals into a vapor that is inhaled by the user,” according to Food and Drug Administration spokesperson Jennifer Haliski.

Unlike a regular cigarette, there’s no tobacco burned and when users inhale, instead of smoke, there’s a steam like vapor.

Some e cigarette devices claim to help people kick their smoking habit, but Bloomberg said he’s not convinced and it’s just another way to inhale nicotine.

“It works about as well as patches, which is to say it really doesn’t work,” he said.

A pro smoking activist read a brief statement lobbying against the bill, saying smoking is within a person’s legal private life and not public health.

“You don’t own me like state property,” the lobbyist said to Bloomberg as she took out a cigarette from her pocket and lit up. The woman was escorted out of the meeting immediately afterward.

Aaron David Ross told CNN’s Poppy Harlow he smoked cigarettes for 10 years. While he’s still addicted to nicotine, he hasn’t smoked a cigarette for two and a half years. He credits kicking the bad habit to e cigarettes.

Ross said he worries many Americans are so opposed to smoking that they’re stigmatizing something some say could save lives.

Thomas Glynn, director of Cancer Science and Trends at the American Cancer Society, said that e cigarette users should smoke with “cautious optimism.”

“Anyone who uses an e cigarette right now does not know what they’re inhaling,” Glynn said. “What we don’t want to do is to take something out of the hands of people which could in fact help people stop using the traditional burn cigarette, which is the enemy.”

There are no e cigarette devices regulated by any federal body, and e cigarettes are not an FDA approved method to quit smoking. A 2010 court decision, which the FDA agreed to abide by, held that if e cigarette companies stopped making therapeutic claims, their products would not be regulated by the FDA, according to Haliski.

Right now, the FDA’s Center for Tobacco Products established in 2009 by the Family Smoking Prevention and Tobacco Control Act has the authority to only regulate certain categories of “tobacco products,” which exclusively applies to cigarettes, cigarette tobacco, roll your own tobacco and smokeless tobacco, according to Haliski.

The FDA intends to propose a rule deeming any product that meets the definition of a “tobacco product” under the act to be subject to FDA’s regulatory authority. The FDA also intends to propose a regulation that would extend the agency’s “tobacco product” authorities to other categories of tobacco products that meet the statutory definition of “tobacco product,” Haliski told CNN.

“Further research is needed to assess the potential public health benefits and risk of electronic cigarettes and other novel tobacco products,” Haliski said.

The FDA declined to comment on the newly signed bill in New York.

Bloomberg signed another controversial bill at the final meeting of the legislative session, which requires the Department of Sanitation commissioner to determine the recyclability of expanded polystyrene foam, leading to the potential ban of the material from food services establishments, mobile food commissaries and retail stores beginning July 1, 2015.

“All of the environmental stuff, the payoff isn’t for years, but it’s what makes the city habitable and keeps us safe,” Bloomberg said.

Poppy Harlow and Laura Dolan contributed to this report

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But the Food and Drug Administration is set to decide soon whether the e cigarette market should remain the Wild West, unfettered by strict advertising and other rules that apply to normal cigarettes. The looming FDA decision and increased attention on Capitol Hill and state capitals have set off a lobbying frenzy in Washington and across the country.

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The industry remembers what happened the last time government stepped in millions of Americans extinguished their smoking habit. So this time Big Tobacco will fight just as hard or harder to protect its turf, even if if means reigniting the Tobacco Wars.

“We believe that regulatory and tax policies should encourage smokers of combustible cigarettes to switch to e cigarettes,” said Michael Shannon, vice president of Lorillard, arguing that e cigarettes should be treated differently than traditional cigarettes because they are different products. “We welcome reasonable FDA regulation on e cigarettes, but feel strongly that regulatory policy should not stifle what may be the most promising tobacco harm reduction product ever.”

The industry s pitch The battery powered cigarettes don t contain tobacco, so they will help hard core smokers switch to a safer alternative, helping save lives.

Even though the Big Tobacco companies have not been able to advertise on TV for four decades, e cigarette ads are now blanketing the airwaves with the firms taking full advantage of the lack of federal restrictions on their products.

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Marlboro maker Altria Group Inc., got in the market with its “MarkTen” electronic cigarette, Reynolds American unveiled the “VUSE” electronic cigarette and Lorillard acquired “blu” e cigarettes. Other big money backers like Silicon Valley entrepreneur Sean Parker have gotten in the action. He s among a group that invested $75 million in Njoy, which markets its product as a way to quit smoking.

But Big Tobacco s emergence in this new market has given ammunition to critics who say e cigarettes which turn nicotine and other chemicals into an inhalable vapor and whose health effects are not fully known are a back door way for the tobacco giants to regain their prominence by hooking a new wave of smokers onto nicotine.

Even independent e cigarette makers say that the emergence of Big Tobacco in the marketplace only complicates their argument that their products will help wean the country off of tobacco and should not be regulated as such.

Richard Carmona, the former U.S. surgeon general who now sits on the board of Njoy Inc., an e cigarette maker not affiliated with a tobacco company, says that his company s goal is to make tobacco “obsolete.”

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But given Big Tobacco s huge investment in e cigarettes, Carmona acknowledges that it “confuses” the industry s argument.

“I talk to people today, and they say, How can you get in bed with tobacco companies? ” said Carmona, a Democrat who lost a 2012 Senate race in Arizona. “I say, I m not. I say, Njoy is not a tobacco company. “

The issue isn t completely new on Capitol Hill and many lawmakers who smoke or are trying to quit have been spotted using e cigarettes, including Boehner and Rep. Duncan Hunter (R Calif.). But the industry isn t relying on potential customers on Capitol Hill to defend the industry.

To push its position, Lorillard has done everything from typical shoe leather lobbying to featuring its blu e cigarettes on signs at a smoking tent it sponsored at the annual “Taste of the South” bash, an event that draws hundreds of Capitol Hill aides and lawmakers, largely from southern states.

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The law firm Dickstein Shapiro billed $2.6 million to Lorillard in lobbying fees for the first nine months of 2013, according to federal lobbying reports. The firm s reported monitoring “all federal and legislative action related to e cigarettes,” among other issues for the company. Lorillard also has Strategic Action Public Affairs on retainer, including GOP strategists Stuart Roy and Blain Rethemeier to work on blu and e cigarette issues.

Blu has even enlisted Hollywood stars like Jenny McCarthy and Stephen Dorff to hock its products, something that is verboten for traditional cigarette brands like Marlboro. A consultant for Lorillard said blu “selected its celebrity spokespeople, the placement of the advertisements featuring these individuals and the events in which they appear to be consistent with blu s goal of reaching smokers and vapers 18 years of age or older.” Both McCarthy and Dorff are over 40 years old.

Lorillard is hardly alone. Altria and Reynolds American paid big in Washington in 2013, spending $7.8 million and more than $1.7 million, during the first nine months of 2013 on lobbying, respectively, though the companies and their consultants did not specify electronic cigarettes on the reports. Independently owned Njoy meanwhile beefed up in Washington by hiring the Downey McGrath Group in November. The company also paid Shockey Scofield Solutions $80,000 over six months of work, according to Senate lobbying disclosure reports.