 In the last few years certain strains of the cannabis plant with higher concentrations of THC and drug tourism have challenged the former policy in the Netherlands and led to a more restrictive approach; for example, a ban on selling cannabis to tourists in coffeeshops suggested to start late 2011.Sale and possession of cannabis is still illegal in Portugal and possession of cannabis is a federal crime in the United States.Tobacco harm reduction describes actions taken to lower the health risks associated with using tobacco, especially combustible forms, without abstaining completely from tobacco and nicotine.