Entrepreneurs have high hopes for cannabis in Switzerland, where business has suddenly taken off in recent months, six years after the country legalized low-potency "marijuana-light". Switzerland changed its laws in 2011 to let adults buy and use cannabis with up to 1 percent THC, the chemical compound that produces a high. But its money-making potential seems only to have been discovered late last year, officials said. "The number of retailers registered to sell low-THC cannabis has risen to 140 from just a handful last year, " said a spokesman for Switzerland's Customs Agency in Berne, which taxes the trade. (See also: Le cannabis débarque dans les kiosques et fait un tabac)