Low Technologies, High Aims

By ANDREW C. REVKIN

Published: September 11, 2007

CAMBRIDGE, Mass. — Beneath the bustling “infinite corridor” linking buildings at the Massachusetts Institute of Technology, just past a boiler room, an assemblage of tinkerers from 16 countries welded, stitched and hammered, working on rough-hewn inventions aimed at saving the world, one village at a time.

M.I.T. has nurtured dozens of Nobel Prize winners in cerebral realms like astrophysics, economics and genetics. But lately, the institute has turned its attention toward concrete thinking to improve the lives of the world’s bottom billion, those who live on a dollar a day or less and who often die young.