It is now seven years since Sir David Attenborough's Blue Planet - yet the plastic crisis rages on

We now know that people can have as much as seven grams of plastic in their brains - when is enough, enough, asks A Plastic Planet co-founder Sian Sutherland.

Seven years ago, Sir David Attenborough's Blue Planet television series on the BBC helped reveal the horrific reality of our plastic addiction. We watched sea turtles entangled in shopping bags and albatross chicks choking on bottle caps, vivid images that ignited a global conversation about plastic pollution. That documentary represented a turning point in public awareness, sparking movements to ban single-use plastics and prompting people to rethink their consumption habits.