Christian Science Monitor: For over a decade, Judid Angamarca lived in a wooden shack on stilts next to an old waste pit, where for years oil sludge from drilling was dumped. The patch of land, the size of a tennis court, was cleaned and covered with earth in 1996. But it stubbornly refused to produce anything she tried to grow. Her three children played in the grass as babies; her animals roamed around, too. The residents living in and around San Carlos have long lived among the wells, pipes, and waste pits …