THE world's oldest library of airsamples has recorded the biggest increases in atmospheric carbon dioxide since sampling began in 1978.
CSIRO air librarian Paul Fraser said the levels of the primary greenhouse gas have been growing at an increasing rate each year since 1978 and may reach an annual increase of two parts per million by the end of this year.
Global CO2 levels have increased from 340ppm to 380ppm in the past 30 years due to combustion of fossil fuels.
Mainstream climate scientists argue the world needs to stabilise levels to around 450ppm by 2050 to avoid the catastrophic impacts of climate change.
Dr Fraser said while the library had revealed CO2 emissions had grown by 70 per cent a year since the 1970s, methane emissions had stabilised in the past seven years.
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