in three or four large u.s. cities, volunteers are being asked to drive hydrogen-fuel cars to test whether hydrogen might be a practical solution to the energy crisis. how are these volunteers chosen and how may one apply to be chosen ?

(may be broke/outdated!)
in three or four large u.s. cities, volunteers are being asked to drive hydrogen-fuel cars to test whether hydrogen might be a practical solution to the energy crisis. how are these volunteers chosen and how may one apply to be chosen ?