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Page last updated at 11:45 GMT, Friday, 8 April 2011 12:45 UK

Citizen scientists help monitor radiation in Japan

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Since Japan's devstating earthquake, citizen scientists in the area have purchased many Geiger counters to help monitor radiation levels.

Click talks to Marcelino Alvarez, the owner of a website crowd-sourcing all these readings to provide up-to-date information about the possible dangers.

And Usman Hague from Pachube - a site specialising in data infrastructure - talks about the practicalities of such crowdsourcing and whether it is a help or hindrance to the authorities.

Listen to this week's edition of Click from the BBC World Service

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