A chemical called nitrogen trifluoride used to make flat-screen tvs may be contributing to greenhouse emissions, so Michael Prather of the University of California has warned .
It is potentially 17,000 more potent than carbon dioxide, and if all were released into the atmosphere, equivalent to 67 million tonnes of CO2.
Toshiba Matsushita Display Technology says they used pure fluoride, zero greenhouse gas emissions are claimed.
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