Plastic waste is a huge problem.  Researchers working on uninhabited islands often find plastic waste, and often flip-flops!  Some enterprising people in the Seychelles have even started using them to make flip-flop art.

Ocean currents are likely to bring plastic together in certain areas, so there could well be a mass in the N W Pacific.  In fact, shipments of rubber ducks which escaped from damaged tankers have been used to measure ocean currents.

(The jury is still out on this one, feel free to get in touch  if you have an answer)

Conrad, Canada:  It’s relativism (thought not in the Einstein sense, in the relative way that if you’re hitting yourself on the head with a hammer, it feels good when you stop).  Muscles get sore from micro-tears and trauma induced by exertion, I’, guessing that stretching, when sore, probably has a temporary de-sensitising effect on the sore muscles which provides, for a few moments at least, a respite from the ache.  Stretching or massaging is probably similar to when a nurse pinches you before administering an injection, which over-stimulates the nerve receptors in the muscles and temporarily numbs the area from registering further pain.

Evgeniy, Japan:  Relaxed muscles need soft and at the same time strenuous exertion.  This operation prepares them for a normal daily job, recovers the normal "working" circulation of the blood and switches from sleeping regime to an active one.  These muscles are always connected by neurones to the central nervous system (CNS), which can stimulate centres of pleasure in the brain.  Using a simple policy of bribery, the CNS teaches us to perform these actions by giving us a treat whenever we stretch. Stretching is good for your muscles, so the brain encourages you to do it by making it pleasurable.

Obviously there are many problems with taking too many fish from the sea and not leaving enough behind to keep their populations going, but there are also problems associated with eating fish which has been farmed.

Fish can escape from farms and ‘genetically pollute’ wild populations and fish farms have been known to infect wild migrating salmon with parasites.  A Canadian study showed that young salmon passing fish farms can pick up sea lice.

As Salmon are piscivorous, they eat fish, farmed salmon need to be fed fish which is caught from the wild, so even when eating farmed Salmon, fish still need to be taken from the wild.

The Marine Stewardship Council has certified Alaskan Salmon as being sustainable.  For more information visit www.msc.org.