It may sound a bit spooky but scientists are encouraging people to hang out in cemeteries in a bid to fight climate change.
The idea is that by monitoring the effects of acid rain on marble headstones, researchers will be able to find out more about pollution levels.
Professor Peter Cawood, president of the Geological Society of Australia, says the EarthTrek project will be recording the changing environment for an ongoing period.
The international project, which started in the US earlier this year, has now been rolled out to the UK and Australia. It involves communities worldwide regularly measuring the exact thickness of tombstones and the lead lettering on them.
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