Virgin Galactic says FAA has cleared it for further flights

Virgin Galactic said Wednesday that the Federal Aviation Administration has cleared it to resume launches after an investigation into why its spaceship veered off course while descending during a July flight with founder ...

EPA rule sharply limits HFCs, gases used as refrigerants

In what officials call a key step to combat climate change, the Environmental Protection Agency is sharply limiting domestic production and use of hydrofluorocarbons, highly potent greenhouse gases commonly used in refrigerators ...

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