Health consequences of the Deepwater Horizon oil spill effects, while even very low doses can cause mutagenic effects, with cancer of particular concern. The carcinogens of concern in crude oil are benzene and polycyclic aromatic hydrocarbons (PAHs), which are present in oil and in the air as a result of offshore controlled burning of crude oil. During the 2010 BP/Deepwater Horizon Gulf oil spill, an estimated one of every 20 barrels of spilled oil was deliberately burned off. Routes of exposure include contact and inhalation. The EPA obtained hundreds of air samples during the spill and a review showed that none of the samples showed concentrations of benzene
BP as a section of the company's website where it communicated its efforts to clean up the spill. BP began a re-branding campaign in late 2010, and decided to focus its brand on the idea of "bringing brilliant minds together with technology at a massive scale to meet the world's energy needs", and focus its messaging on telling stories about people. In February 2012 BP North America launched a $500 million branding campaign to rebuild its brand. The company's advertising budget was about $5 million per week during the four-month spill in the Gulf of Mexico, totaling nearly $100 million. In