Charlotte Jee, Christina Mercer & Hannah Williams
The recreational use of marijuana is now legal in a number of states in the US. Adults over the age of 21 are now able to use marijuana in 10 states such as California, Alaska and Washington D.C. without a doctor's letter, whilst medical marijuana has been legalised across 30 states.
A number of tech startups have already started to take advantage of this vast (and growing) multi-billion market for cannabis products. They include Uber-style delivery platforms, review and information websites and social media for stoners.