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.
A damaged oil tank in the Kuwaiti desert.
"Once the wells had stopped burning, they were still spewing oil, sometimes 40 feet into the air," Salgado said.
"Moving like phantoms through the gloom, covered in oil for hours on end, these men were too close to danger to think of anything but the job at hand," Salgado said.
Salgado dedicated his book to the "fearless men" who risked their lives to end the environmental crisis.
Men work together to stop gushing oil.
In addition to stopping an environmental crisis, the men helped stabilize Kuwait's economy as well as the global oil market.
The oil workers came from all around the world to help, Salgado said.
A wall of fire and smoke towers over a worker.
An oil-covered worker stops to rest.
A man herds sheep, their fur blackened by soot.