Starting in 2000, a program in Mexico's Coahuila state called "Piso Firme" (Firm Floor) offered up to $150 per home in mixed concrete, delivered directly to families who used it to cover their dirt floors. Scholar Paul Gertler evaluated the impact: Kids in houses that moved from all-dirt to all-concrete floors saw parasitic infestation rates drop 78 percent; the number of children who had diarrhea in any given month dropped by half; anemia fell more than four-fifths; and scores on cognitive tests went up by more than a third. (Perhaps unsurprisingly, mothers in newly cemented houses reported less depression and greater life satisfaction.)Concrete also works for highways, which improves economies in the third world.
Wednesday, January 04, 2012
It's the Simple Things That Count: Like Concrete
Charles Kenny writes: