GuLF Study Environmental Health Sciences (NIEHS), part of the National Institutes of Health, and aims to recruit 55,000 of the 150,000 workers who volunteered or were employed to help clean up the spill. It is led by Dale Sandler, head of the NIEHS's epidemiology branch. The "Deepwater Horizon" oil spill was the world's largest accidental marine oil spill. It began on 20 April 2010 after an explosion on the "Deepwater Horizon", a drilling rig leased by BP to drill an exploratory well. Between then and 15 July, when the well was capped, over four million barrels of oil (around 170 million US
Economic effects of the Deepwater Horizon oil spill approximately $23 billion, in a region that supports over 400,000 travel industry jobs generating $34 billion in revenue annually. On 1 November, BP announced plans to spend $78 million to help Louisiana tourism and test and advertise seafood. The real estate prices and a number of transactions in the Gulf of Mexico area decreased significantly during the period of the oil spill. As a result, area officials wanted the state legislature to allow property tax to be paid based on current market value, which according to Florida State Rep. Dave Murzin could mean millions of dollars in losses for each