Could Indonesia's mud flow be put to good use? As steaming mud continues to pour over Sidoarjo, in eastern Java, Indonesia, geologists who have visited the scene say the four-month-old eruption may never be stopped — at least not by human intervention. The best way of dealing with the mud may be to pump it out to sea, as Indonesia's government is planning. But a long-term solution could involve putting the mud to commercial use in a health resort or as construction material. These ideas won't immediately console the 11,000 people who have lost their homes since 28 May, when...