Experts are concerned over the health risks for offshore workers following the burning of thousands of barrels of oil by BP to destroy the crude being accumulated in the Gulf of Mexico.
The plans to burn off oil and gas will increase air pollution risks for BP workers near a sunken BP-leased rig as well as for residents on the Louisiana coast more than 50 miles (80 kilometers) away, chemist Wilma Subra told AFP.
"They are getting ready to start burning both the crude and the gas. When the winds come from the south, it will blow the emissions toward shore and decrease air quality around the wellhead," she said.
The burnings will put BP workers at the wellhead site "at greater risk" of adverse health effects, she warned.
A key health concern is benzene a known cancer-causing agent found in oil and refined gasoline, she explained.
Louisiana on Monday reported 109 people, most of them workers, have reported spill-related illnesses since April 20, when an explosion tore through the Deepwater Horizon rig, killing 11 men.
BP has been under intense pressure from the public and the White House to increase it cleanup efforts.
But Subra warns the company's stated goal of accelerating oil capture rates from about 15,000 barrels a day to up to 80,000 barrels by mid-July carries health risks.
"There have been trade-offs in every decision regarding this spill," she said.