In some countries , a lack of reliable electricity is to blame for deaths during childbirth . Dr. Laura Stachel witnessed this tragic truth during a trip to Nigeria five years ago . The average life expectancy in the United States has increased by about 10 percent since 1990.
In some countries , a lack of reliable electricity is to blame for deaths during childbirth . Dr. Laura Stachel witnessed this tragic truth during a trip to Nigeria five years ago . She and her husband are now delivering a solution : solar energy in a suitcase .