The Price of Power Is there a link between Pylons and cancer?

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Presentation transcript:

The Price of Power Is there a link between Pylons and cancer?

A worrying trend In the UK, 1,538 children were diagnosed with cancer in 2002

Can we explain this trend?  There has been a sharp increase in the amount of people being diagnosed with cancer since  Worryingly research carried out in 2002 showed that 1,538 of the population diagnosed with cancer were actually children.  This increase could be as a result of many factors. However, there are many scientists that believe this increase could partially be explained by the increase in the number of overhead cables and pylons around the country!  To assume that the increase in the amount of people being diagnosed with cancer is as a direct result of the increase in power cables and pylons being constructed would be naïve.  Your objective today is to look at all the evidence and form your own opinion. You should base your opinion on facts, and use these facts to emphasise your conclusion.

Related Headlines PYLONS ‘TREBLE CANCER PARTICLES’ PYLONS ‘DOUBLE CHILD CANCER RATE, NOTHING MORE THAN FEAR FACTOR: NO DEFINITE LINK BETWEEN PYLONS AND CANCER CANCER FROM LIVING NEAR POWER LINES RULED OUT HOUSE PRICES TUMBLE THROUGH FEAR OF CANCER FROM LOCAL PYLON PARENT BLAMES OVERHEAD CABLES FOR HER CHILDS PREMATURE DEATH

Here comes the science!  Every current carrying conductor (an overhead power cable) generates a magnetic field.  It is suspected that this magnetic field is what is responsible for the increase in cancer rates  Click on the following videos to get a better understanding of the phenomenon!

The Equipment

The effect of a magnetic field  All magnetic compasses are aligned to the earths natural magnetic field  As a result of this the needle of the compass points North.  However when a stronger magnetic field is present the needle of the compass points to its north pole. See Movie 1

The magnetic field around a current carrying wire  Originally all the compass needles are pointing to the north pole of the earths magnetic field.  When the power is turned on the current passing through the wire creates a magnetic field.  This affects the needles on the compasses. See Movie 2

Science in the News  Read two very different views on the link between pylons and cancer.  This article puts forward the issue that pylons increase the risk of cancer.  This article rejects claims that pylons increase the risk of developing cancer.

Activity  Your group must formulate an opinion based on facts that you resource.  There are a number of suggested web sites to follow as well as a wealth of other resources available on the net.  Remember what ever opinion you reach you have to have specific facts to validate your opinion.

Plenary  Your teacher will ask you to present your findings in a variety of formats.  You will need to present your ideas to the rest of the class when you are finished. Remember not everyone will agree with you so you require facts to support your opinion.