In this sleepy Texan town there's always a flare on the horizon, funnelling out of the chimney of some vast, grey, oil refinery. And there's always a fear: "Go inside a building or vehicle. Close all windows and doors. Stay off the telephone and turn on the television for more information." This is shelter in place. Announced by loudspeaker, and part of the local poor, black community's routine: "all my kids have respiratory problems, but I can't afford to do better".

'Benzene', 'butadiene', 'hydrogen sulphide', 'nitrogen oxide'...all pollute the air around the neighbourhoods of Texas’s outback: "We know where it’s coming from - we been knowing for years - but we didn't know what to do about it." Each year, Texan industry is permitted to emit millions of tons of toxic pollutants into the air. Refineries are also allowed to release thousands of tons more in 'accidental' or 'unscheduled' emissions. The law defines these as 'upsets'. But toxic suits and breathing masks can't be the norm...

"They sedate you with the little cheques, and you forget for a little while", says Latasha, a mother of three. The Director of Media Relations at Valero Energy Corp describes such pay-offs as "standard procedure". But a powerful sense of injustice is rising. In the churches, where evangelical leaders wax lyrical about the "devil's toxic deeds", and in the town halls, where a white lawyer preaches plainly to those who will listen...

"In a practical sense the [oil refineries] have a limitless allowance of emission." And when a group of children in Port Arthur show signs of respiratory disease, Wilma Subra takes on the case. Families watch Obama on the TV screen, and believe that "change is finally here". The refineries try to settle out of court. But when it comes to trial, the case is dismissed.

"To be blunt, the people are treated as if they're expendable", says Reverend malveaux, "they're African-American; they're poor, they're not well educated, and they don't have any political influence." The industry maintains a wall of ignorance -"I'm not a physician. I don't know what the long-term health benefits are" - but the long-standing residents have heard enough: "this is what it's like in this country", spits Alfred, "the big and the powerful, they pretty much get what they want".