A wonderful little film and a neat idea. I will not spoil the effect by explaining here. Watch the film!
The film truly highlights the problem of plastic pollution in the ocean. Modern plastics do not decompose readily, but persist in the environment for decades. This is a problem that deserves more attention and should be in the mind of anyone who treasures our seas.
Apparently the biggest problem is not the large pieces of plastic like those used in making the chair, but rather the microplastics. Under the influence of wave and sunlight, plastic slowly breaks down into smaller and smaller bits. These are sand size or smaller granules that have come to pervade the entire ocean. The granules are easily ingested by the smaller creatures of the plankton community, the food on which all ocean life depends.
When boating in Alaska we see some plastic, even far from the major urban sources of this pollution. Walking the tide-line in any bay or cove reveals small bits of colorful plastic. There is not a lot, but it is always there.