Search crews sifting through the wreckage of the Air India jetliner that crashed last week retrieved the second black box, as they seek to gain more evidence to understand what caused the accident that killed all but one of the 242 people on board.

Kirit Patel was killed when the London-bound Air India plane crashed soon after taking off on Thursday from Ahmedabad, along with 240 other passengers.

Stricter environmental regulations and slower global economic growth will soften marine fuel demand in the coming years, the International Energy Agency said in its annual report on Tuesday.