Oil workers battle a fire in Kuwait in 1991. It took nearly an entire year to cap the oil wells that were set on fire by Saddam Hussein's forces during the Gulf War.
Workers dive into a lake to help clean themselves off.
Many of the wellheads had to be repaired or replaced. "It was a bit like trying to put a new faucet on a broken water pipe -- without turning off the water," Salgado wrote in his book.
Hundreds of wells were set on fire by Iraqi troops. It was the largest oil spill in world history.
Salgado recalls intense heat, toxic fumes and deafening noise. "By the end of each day, my jaws literally ached from the sheer tension of being exposed for hours on end to heat, noise and oil and to the perennial hazard of a major explosion," he said.