Marijuana can be used legally within the following US states : Alaska, California, Colorado, Maine, Massachusetts, Nevada, Oregon, Washington state, Washington DC, and Vermont. Trudeau has ruled that marijuana can be legally used throughout the whole of Canada. Do board members think that marijuana should be legal in the UK ? Properly regulated and taxed, it could become a money generator for the Treasury, and millions could be saved if our police force no longer had to allocate time and manpower to take it off the streets. There are those who champion cannabis as being beneficial for hea