British Airways operated its first-ever carbon-neutral flight powered by recycled cooking oil this week, a major step in the airline’s goal to reaching net zero carbon emissions by 2050. The plane traveled from London Heathrow to Glasgow Airport on Tuesday and was powered directly by sustainable aviation fuel (SAF) provided by British multinational gas giant BP, according to a British Airways press release. The flight’s SAF was blended at 35 percent with traditional jet fuel “in accordance with technical aviation specifications,” according to British Airways.