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New greenhouse gas discovered

AFP-JIJI

Scientists in Canada have announced the discovery of a greenhouse gas with unprecedented potential to warm the Earth, and said the chemical has been lurking in the atmosphere for decades.

The substance — perfluorotributylamine (PFTBA) — “is the most radiatively efficient chemical found to date, breaking all other chemical records for its potential to impact climate,” scientists at the University of Toronto said in a statement.

The man-made chemical has been used in electrical equipment since the mid-20th century, and currently is used for electronic testing and as a heat transfer agent.

It has only now been determined to affect climate, and according to the University of Toronto chemists, there are no known processes for destroying or removing it from the lower atmosphere.

“So it has a very long lifetime, possibly hundreds of years,” said researcher Cora Young.

“Calculated over a 100-year time frame, a single molecule of PFTBA has the equivalent climate impact as 7,100 molecules of CO2,” added her colleague Angela Hong.

The findings were published in the online edition of Geophysical Research Letters.

  • zlop

    Surprisingly, with a high molecular weight, perfluorotributylamine is a gas (“vapor density, 23.3 (vs air). vapor pressure, 1.3 mmHg ( 25 °C”) — In general greenhouse gases Cool — could this be one that warms ?