「水タバコは害が少ない」は本当か？　アメリカの若者に流行

Kiev, UKRAINE: A visitor smokes a hookah in Kiev?s ?Aroma of the East? bar 21 February 2007, where the pastime has become popular. AFP PHOTO/GENIA SAVILOV (Photo credit should read GENIA SAVILOV/AFP/Getty Images)

kuwait city, KUWAIT: Kuwaiti men smoke waterpipe and play cards at a coffee shop in Kuwait City, 27 June 2006. With summer even hotter than usual -- mercury has hit 50 degrees Celsius (122 Fahrenheit) during the day, some six degrees above the June average, campaign rallies for the June 29 parliamentary election are held only at night when the heat subsides a bit, though the temperature remains over 35 C (95 F). AFP PHOTO/AWAD AWAD (Photo credit should read AWAD AWAD/AFP/Getty Images)

LONDON - MARCH 15: A man smokes a shisha in a cafe on Edgeware road on March 15, 2007 in London. The shisha bars, popular with the middle eastern communities of London's Edgeware road, face an uncertain future as the Smoking ban for England appoaches, starting July 1, 2007. (Photo by Bruno Vincent/Getty Images)

LONDON - MARCH 15: Men smoke shisha in a cafe on Edgeware road on March 15, 2007 in London. The shisha bars, popular with the middle eastern communities of London's Edgeware road, face an uncertain future as the Smoking ban for England appoaches, starting July 1, 2007. (Photo by Bruno Vincent/Getty Images)

LINDAU, GERMANY - APRIL 17: Young girls sit at the beach of Lake Constance sucking a sheesha on April 17, 2007, near Lindau, Germany. The un-seasonably warm weather has heralded the start to what weather forecasters predict will be a record breaking summer. (Photo by Johannes Simon/Getty Images)

London, UNITED KINGDOM: TO GO WITH AFP STORY 'Britain-health-tobacco-shisha' BY Elodie Mazein Customers at the Mamounia Lounge, a cafe in west London smoke a Shisha 26 June 2007. Businesses that offer customers shisha water pipes to smoke tobacco are waging an 11th-hour bid for an exemption to a smoking ban that comes into force in England 01 July 2007 . AFP PHOTO/CHRIS YOUNG (Photo credit should read CHRIS YOUNG/AFP/Getty Images)

London, UNITED KINGDOM: TO GO WITH AFP STORY 'Britain-health-tobacco-shisha' BY Elodie Mazein Customers at the Mamounia Lounge, a cafe in west London smoke a Shisha 26 June 2007. Businesses that offer customers shisha water pipes to smoke tobacco are waging an 11th-hour bid for an exemption to a smoking ban that comes into force in England 01 July 2007 . AFP PHOTO/CHRIS YOUNG (Photo credit should read CHRIS YOUNG/AFP/Getty Images)

RAMALLAH, WEST BANK - JULY 10: A Palestinian waiter carries a couple of hookah water pipes in the Stars & Bucks Cafe in Manara Square on July 10, 2007 in the centre of Ramallah, the West Bank's most cosmopolitan Palestinian city. The cafe, with its name and logo seemingly similar to the Seattle-based international Starbucks chain, offers its customers a mix of West and Middle East; from free wireless access for laptop computers and Italian cappuccino to water pipes and Arabic coffee. The West Bank is expected to enjoy a financial kick start as the 500 million shekels (US$119 million) of tax funds Israel recently released to the new Palestinian government works its way through the economy. (Photo by David Silverman/Getty Images)

Tunisian young women smoke water pipes, known locally as narguileh or shisha, at a cafe in Tunis in the early hours of 02 October 2007. During the holy fasting month of Ramadan, Muslims must abstain from eating, drinking and smoking between sunrise and sunset. AFP PHOTO / FETHI BELAID (Photo credit should read FETHI BELAID/AFP/Getty Images)

A young Tunisian woman smokes a water pipe, known locally as narguileh or shisha, at a cafe in Tunis in the early hours of 02 October 2007. During the holy fasting month of Ramadan, Muslims must abstain from eating, drinking and smoking between sunrise and sunset. AFP PHOTO / FETHI BELAID (Photo credit should read FETHI BELAID/AFP/Getty Images)

Iraqi Kurds smoke waterpipes at a cafe in the northern Kurdish city of Dohuk, late 05 November 2007. US President George W. Bush, vying to avert a Turkish incursion into Iraq, pledged, 05 November to step up US military and intelligence cooperation to aid Turkey's fight against Kurdish rebels. AFP PHOTO/AHMAD AL-RUBAYE (Photo credit should read AHMAD AL-RUBAYE/AFP/Getty Images)

TO GO WITH AFP STORY BY KHALIL JALIL Iraqi men smoke waterpipes inside Hasan Ajmi cafe in Baghdad's al-Rashid street, 09 January 2008. Nothing much is left from Baghdad's famous cultural cafes except some vague memories of an ancient past when these cafes used to be one of Baghdad's most remarkable features during the beginning of the past century. AFP PHOTO/ALI YUSSEF (Photo credit should read ALI YUSSEF/AFP/Getty Images)

TO GO WITH AFP STORY BY KHALIL JALIL Iraqi men smoke waterpipes inside Hasan Ajmi cafe in Baghdad's al-Rashid street, 09 January 2008. Nothing much is left from Baghdad's famous cultural cafes except some vague memories of an ancient past when these cafes used to be one of Baghdad's most remarkable features during the beginning of the past century. AFP PHOTO/ALI YUSSEF (Photo credit should read ALI YUSSEF/AFP/Getty Images)

SHARM EL-SHEIKH, EGYPT- MAY 20: A Tourist enjoys smoking shisha on May 20, 2008 in the south Sinai peninsula resort of Sharm el-Sheikh, Egypt. (Photo by Salah Malkawi/ Getty Images)

A youth smokes a waterpipe (Shisha) at a cafe in Dubai on May 31, 2008. The Gulf emirate of Dubai banned the sale of tobacco to anyone under the age of 20 with immediate effect and barred young people from public areas in which smoking is allowed. The announcement was made in public advertisements in Arabic-language newspapers as part of a 'Youth Without Tobacco' campaign. The campaign was launched to coincide with World No Tobacco Day on May 31. AFP PHOTO/MARWAN NAAMANI (Photo credit should read MARWAN NAAMANI/AFP/Getty Images)

A cafe employee tries a waterpipe (Shisha) before giving it to a customer in Dubai on May 31, 2008. The Gulf emirate of Dubai banned the sale of tobacco to anyone under the age of 20 with immediate effect and barred young people from public areas in which smoking is allowed. The announcement was made in public advertisements in Arabic-language newspapers as part of a 'Youth Without Tobacco' campaign. The campaign was launched to coincide with World No Tobacco Day on May 31. AFP PHOTO/MARWAN NAAMANI (Photo credit should read MARWAN NAAMANI/AFP/Getty Images)

A woman smokes waterpipe (Shisha) at a cafe in Dubai on May 31, 2008. The Gulf emirate of Dubai banned the sale of tobacco to anyone under the age of 20 with immediate effect and barred young people from public areas in which smoking is allowed. The announcement was made in public advertisements in Arabic-language newspapers as part of a 'Youth Without Tobacco' campaign. The campaign was launched to coincide with World No Tobacco Day on May 31. AFP PHOTO/MARWAN NAAMANI (Photo credit should read MARWAN NAAMANI/AFP/Getty Images)

A waiter wearing traditional Arab costume prepares on September 2, 2008 charcoal for waterpipes for customers who flood Beirut's cafes after the break of the fast during the holy month of Ramadan. Throughout the month of Ramadan, which started on September 1, observant Muslims are required to abstain from food, drink and sex from dawn to dusk. Activity peaks between 'iftar', the breaking of the fast at sunset, and 'suhur', the last meal of the day before sunrise when nightlife booms. AFP PHOTO/JOSEPH BARRAK (Photo credit should read JOSEPH BARRAK/AFP/Getty Images)

CAIRO, EGYPT - FEBRUARY 24: A tourist couple relax with a sheesha, also known as a water-pipe or nargilla, fresh lemonade and mint tea at the el-Fishawi coffee shop, made famous by the Egyptian Nobel prize laureate Naguib Mahfouz, in the Khan al-Khalili bazaar on February 24, 2009 in Cairo, Egypt. Despite being known primarily for its Pharaonic monuments, some almost 5,000 years old, the country has a rich Islamic heritage. The various Muslim dynasties, which ruled the country since its capture from the Byzantines by the Muslim Arabs in 639 AD until the demise of the Ottoman Turks at the end of the First World War, have left the country with hundreds of splendid buildings erected by the ruling elite of more than 1,200 years. (Photo by David Silverman/Getty Images)

TO GO WITH AFP STORY BY JOCELYNE ZABLIT A Lebanese man smokes a narghile, or waterpipe, at a restaurant in downtown Beirut on May 25, 2009. In Lebanon, the anti-smoking lobby is barely a blip on the radar, the government cares little about the issue, so the Havanas are among the world's cheapest here, cigarettes are free of punitive pricing and health warnings are barely visible on the side of packs. Health professionals say the number of smokers in Lebanon is among the highest in the region and cancer-related illnesses directly linked to tobacco are rising at a rapid rate. Most worrisome is a growing trend of narghile smokers, especially among teenagers who wrongly believe it is less harmful to their health than cigarettes, experts say. AFP PHOTO/JOSEPH BARRAK (Photo credit should read JOSEPH BARRAK/AFP/Getty Images)

CAIRO, EGYPT - JUNE 2: An Egyptian man adds coals to another's water-pipe on June 2, 2009 in Cairo, Egypt. The Egyptian capital is preparing to receive US President Barack Obama, who is due to deliver his Middle East policy speech at Cairo University this Thursday. (Photo by David Silverman/Getty Images)

Syrian man smoke waterpipe at cafe in Damascus on October 12, 2009. President Bashar al-Assad has issued a decree banning smoking in a wide range of public places such as cafes and restaurants, official news agency SANA reported. The decree 'forbids smoking and the sale of tobacco in any form in cafes, restaurants and nightclubs as well as in schools, universities, hospitals, public transport, cinemas, theatres and museums.' AFP PHOTO/LOUAI BESHARA (Photo credit should read LOUAI BESHARA/AFP/Getty Images)

TO GO WITH AFP STORY 'China-economy-trade-Mideast,FEATURE' by D'Arcy Doran In this picture taken on October 20, 2009, a restaurant employee (L) takes care of grilling lamb skewers beneath the glow of swirling neon signs in Yiwu. Smoke from hookah pipes and the aroma of lamb skewers on the grill mix in the chilly autumn air as men talk loudly in Arabic over pulsating music beneath the neon glow of restaurant signs. AFP PHOTO/PHILIPPE LOPEZ (Photo credit should read PHILIPPE LOPEZ/AFP/Getty Images)

TO GO WITH AFP STORY BY ROUEIDA MABARDI Syrian men smoke 'nargileh' or waterpipes, which are popular among locals and tourists, at a traditional cafe in Damascus' Old City on April 25, 2010. Syria became the first Arab state to ban smoking in public places, including restaurants, cafes, hospitals, universities and public transport earlier this month. The decree, which was signed in November 2009 by President Bashar al-Assad, went into effect on April 21. Hubble-bubble pipes, which are a favorite pastime in the region, have been restricted in public to well-ventilated and designated areas. AFP PHOTO/LOUAI BESHARA (Photo credit should read LOUAI BESHARA/AFP/Getty Images)

TO GO WITH AFP STORY BY ROUEIDA MABARDI A young Syrian smokes 'nargileh' or waterpipe, which is popular among locals and tourists, at a traditional cafe in Damascus' Old City on April 25, 2010. Syria became the first Arab state to ban smoking in public places, including restaurants, cafes, hospitals, universities and public transport earlier this month. The decree, which was signed in November 2009 by President Bashar al-Assad, went into effect on April 21. Hubble-bubble pipes, which are a favorite pastime in the region, have been restricted in public to well-ventilated and designated areas. AFP PHOTO/LOUAI BESHARA (Photo credit should read LOUAI BESHARA/AFP/Getty Images)

TO GO WITH AFP STORY BY ROUEIDA MABARDI A Syrian man smokes 'nargileh' or waterpipe, popular among locals and tourists, at a traditional cafe in Damascus' Old City on April 25, 2010. Syria became the first Arab state to ban smoking in public places, including restaurants, cafes, hospitals, universities and public transport earlier this month. The decree, which was signed in November 2009 by President Bashar al-Assad, went into effect on April 21. Hubble-bubble pipes, which are a favorite pastime in the region, have been restricted in public to well-ventilated and designated areas. AFP PHOTO/LOUAI BESHARA (Photo credit should read LOUAI BESHARA/AFP/Getty Images)

A waiter wearing a Germany's footbal team apron prepares a waterpipe in the form of a soccer ball at a cafe in Beirut on June 11, 2010 as Africa's first football World Cup began in an explosion of colour and emotion at an opening ceremony in Johannesburg's Soccer City. AFP PHOTO/JOSEPH EID (Photo credit should read JOSEPH EID/AFP/Getty Images)

A waterpipe in the form of a soccer ball is seen on a table along with a replica of World Cup trophy at a cafe in Beirut on June 11, 2010, as Africa's first football World Cup began in an explosion of colour and emotion at an opening ceremony in Johannesburg's Soccer City. AFP PHOTO/JOSEPH EID (Photo credit should read JOSEPH EID/AFP/Getty Images)

TO GO WITH AFP STORY BY MAI YAGHI A Plaestinian man smokes nargileh or waterpipe while watching a World Cup 2010 match on a big screen at an outdoors cafe in Gaza City on June 20, 2010, as football fans escape the Gaza Strip's dreary confinement to follow the WC2010 matches which are often interrupted by power cuts. AFP PHOTO/MOHAMMED ABED (Photo credit should read MOHAMMED ABED/AFP/Getty Images)

To go with Pakistan-India-diplomacy-water,FOCUS by Waqar Hussain In this photograph taken on July 9, 2010, a Pakistani farmer smokes a cigarrette and tobacco from hubble-bubble next to a rice field in the village of Budhan Kay some 40 kilometres (25 miles) north of Lahore. When the foreign ministers of India and Pakistan sit down Thursday for their first face to face talks since New Delhi called off a peace process after the 2008 Mumbai attacks, water will be one of the issues on the agenda. Water availability in Pakistan has fallen from about 5,000 cubic metres per capita in the early 1950s to less than 1,500 cubic metres, said a 2008 report for the Woodrow Wilson International Center for Scholars. But many in Pakistan have blamed arch-rival India, the powerful neighbour to the east, of stealing water. Whipping up anger, Islamist groups even called for a new jihad over water -- something few took seriously. India and Pakistan say all issues are up for discussion on Thursday, but right-wing religious groups and farmers in Pakistan believe the dialogue will be useless unless Pakistan focuses on water and Kashmir. Unreliable rains mean that agriculture in Punjab is heavily dependent on river water. Agriculture accounts for about 20 percent of Pakistan's gross domestic product. Millions of jobs are dependent on farming. AFP PHOTO/ ARIF ALI (Photo credit should read Arif Ali/AFP/Getty Images)

A Kashmiri shopkeeper smokes a hookah while selling 'Kangir' - traditional Kashmiri fire pots - in Srinagar on December 8, 2010. With the arrival of winter in the Kashmir valley, people are beginning to stock up on traditional fire pots made of clay and twigs. The fire pots are filled with hot coal and placed under the 'Pheran', loose traditional clothing that covers one from the neck to the knees, for warmth. AFP PHOTO/ Tauseef MUSTAFA (Photo credit should read TAUSEEF MUSTAFA/AFP/Getty Images)

Iraqi men smoke waterpipes at al-Shahbandar cafe, known for hosting Iraq's top elite thinkers and poets, in central Baghad's Al-Mutanabi Street on December 3, 2010. Iraqi poets and intellectuals are protesting against the closure of social clubs where alcohol is served. AFP PHOTO/AHMAD AL-RUBAYE (Photo credit should read AHMAD AL-RUBAYE/AFP/Getty Images)

Egyptian anti-government demonstrators smoke shisha (waterpipe) as they wait for the announced address by President Hosni Mubarak at a coffee shop near Cairo's Tahrir Square on February 10, 2011 amid rumors that the embattled leader appears to be on the brink of stepping down. AFP PHOTO/MARCO LONGARI (Photo credit should read MARCO LONGARI/AFP/Getty Images)

Egyptian anti-government demonstrators drink tea and smoke shisha (waterpipe) as they wait for the announced address by President Hosni Mubarak at a coffee shop near Cairo's Tahrir Square on February 10, 2011 on the 17th day of consecutive protests calling for the oust of the embattled leader. AFP PHOTO/MARCO LONGARI (Photo credit should read MARCO LONGARI/AFP/Getty Images)

Syrian men smoke waterpipe, locally known as nargileh, in a cafe decorated with portraits of President Bashar al-Assad in Damascus on April 3, 2011. Syria's former agriculture minister Adel Safar was asked by the president to form a new government, the state-run news agency SANA reported. AFP PHOTO/ANWAR AMRO (Photo credit should read ANWAR AMRO/AFP/Getty Images)

Pakistani Gul Rehman 92, smokes a traditional Hookah pipe on the roadside in Abbottabad on May 7, 2011, where bin Laden was found and killed by US commandos in a shock operation on May 2. Osama bin Laden's wife said the Al Qaeda kingpin had lived with family in a compound in Abbottabad for five years before he was shot dead by US forces, Pakistani security officials said. AFP PHOTO/Asif HASSAN (Photo credit should read ASIF HASSAN/AFP/Getty Images)

A Pakistani man smokes a traditional Hookah pipe in Lahore on May 31, 2011, on 'World No Tobacco Day'. Pakistan accounts for a large proportion of the cigarettes consumed in South Asia where about 100,000 people die annually from diseases caused by the use of tobacco, reports the Coalition of Tobacco Control in Pakistan. AFP PHOTO/ARIF ALI (Photo credit should read Arif Ali/AFP/Getty Images)

RAMALLAH, WEST BANK - AUGUST 24: Palestinian girls smoke shisha pipes and drink coffee in Stars and Bucks coffee shop on August 24, 2011 in Ramallah, West Bank. Palestinian President Mahmoud Abbas will formally submit the application for Palestinian statehood to the 66th United Nations General Assembly in New York on September 20th. The Palestinians and the Israelis are taking part in global diplomatic lobbying to win support for their differing positions on statehood. The Palestinian bid is borne from two decades of on-and-off peace talks that have failed to produce a deal. The ultimate goal of the Palestinian Authority is to end Israeli occupation and to establish a sovereign and independent state on the 1967 borders with Jerusalem as its capital. (Photo by Christopher Furlong/Getty Images)

RAMALLAH, WEST BANK - AUGUST 24: Palestinian girls smoke shisha pipes and drink coffee in Stars and Bucks coffee shop on August 24, 2011 in Ramallah, West Bank. Palestinian President Mahmoud Abbas will formally submit the application for Palestinian statehood to the 66th United Nations General Assembly in New York on September 20th. The Palestinians and the Israelis are taking part in global diplomatic lobbying to win support for their differing positions on statehood. The Palestinian bid is borne from two decades of on-and-off peace talks that have failed to produce a deal. The ultimate goal of the Palestinian Authority is to end Israeli occupation and to establish a sovereign and independent state on the 1967 borders with Jerusalem as its capital. (Photo by Christopher Furlong/Getty Images)

TO GO WITH AFP STORY BY BURAK AKINCI University students smoke the hookah, or the water pipe, in a cafe downtown Ankara on January 31, 2013. After banning smoking in public places, the Turkish government has gone one step further by clamping down on an ancient tradition -- the hookah, or water pipe. AFP PHOTO / ADEM ALTAN (Photo credit should read ADEM ALTAN/AFP/Getty Images)

TO GO WITH AFP STORY BY BURAK AKINCI University students smoke the hookah, or the water pipe, in a cafe in downtown Ankara on January 31, 2013. After banning smoking in public places, the Turkish government has gone one step further by clamping down on an ancient tradition -- the hookah, or water pipe. AFP PHOTO / ADEM ALTAN (Photo credit should read ADEM ALTAN/AFP/Getty Images)

TO GO WITH AFP STORY BY BURAK AKINCI University students smoke the hookah, or the water pipe, in a cafe in downtown Ankara on January 31, 2013. After banning smoking in public places, the Turkish government has gone one step further by clamping down on an ancient tradition -- the hookah, or water pipe. AFP PHOTO / ADEM ALTAN (Photo credit should read ADEM ALTAN/AFP/Getty Images)