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It's been called 'The Green Rush' - the race to make money from marijuana.

California has become the world's biggest legal market for recreational cannabis.

Anyone over 21 can buy or use the drug, and licences are being granted to grow and sell it.

Meet a farmer and a retailer hoping to cash in on the new industry, despite the health concerns expressed by opponents of legalisation.

This clip is originally from The Emma Barnett Show on Tuesday 29 May.