I have just got back from Dublin (more of this shortly) where I saw more evidence of the woes of rubbish with these examples floating by the docks.
However must confess that:
1) I flew there
2) I flew there from Heathrow
3) On the way home I shopped for bread and milk and having no spare space in my bags had to use one of the shop's dastardly plastic ones.
Its very hard with modern life to be eco-pure. I don't think that matters as much as simply caring enough to do something.
This article describes a family's effort to go plastic free: even though they failed, as modern life is based upon plastic. at least they tried.