Gloria Trevino doesn’t need a Washington politician to tell her that a daily gusher of Canadian tar sands crude won’t do her air in south Houston any favors. Surrounded by massive petrochemical plants, she and her neighbors in this industrial community already breathe some of the dirtiest air in the country. Her small one-story pink stucco house is sandwiched between giant multi-colored steel storage containers like a tiny doll house stuck in the middle of a field of gigantic cooking pots.