The full extent of the global crisis of plastic in our oceans was revealed in studies by Professor Jenna Jambeck and her team from the University of Georgia. Their calculations that there were five grocery sized bags filled with plastic for every foot of coastline in the world made headlines around the globe.

What are we going to do about all this plastic?

It’s going to take more than just banning the use of plastic drinking straws, and this final episode takes you to meet some people who…