Scientists discover Earth's 'most powerful' greenhouse gas to date
A new greenhouse gas that is 7,000 times more powerful than carbon dioxide at warming the earth has been discovered by researchers in Canada.
A new greenhouse gas that is 7,000 times more powerful than carbon dioxide at warming the earth has been discovered by researchers in Canada.
The gas, perfluorotributylamine, has been in use by the electrical industry since the middle of the 20th century.
The chemical, which does not occur naturally, breaks all records for potential impacts on the climate, said the researchers at the University of Toronto's department of chemistry.
"We claim that PFTBA has the highest radiative efficiency of any molecule detected in the atmosphere to date," said Angela Hong, one of the co-authors.
The study, published in the journal Geophysical Research Letters, found PFTBA was 7,100 times more powerful at warming the earth over a 100-year time span than CO {-2}.
However, concentrations of PFTBA in the atmosphere are low - 0.18 parts per trillion in the Toronto area - compared to 400 parts per million for carbon dioxide.