Some of the world's biggest problems, like single-use plastic rubbish, can only be solved by entrepreneurs brave enough to walk the talk, says Zero Co Founder Mike Smith. Australian company Zero Co is on a mission to stop single-use plastic. One year from launch, the Byron Bay personal care and cleaning products brand is already achieving huge milestones, like pulling 10 tonnes of plastic from the ocean to make its refillable �forever bottles� and becoming the most successful start-up to hold a crowd-funding campaign in Australian history.