now young people like eric munjaneza see a future here. at 20, he has opened up a barber's shop. >> i used to use diesel generators. that was loud and expensive. it also stank. everything's better using hydro- power. i've hired assistants to cope with demand. sometimes customers have to stand in line to get in. >> the "land of a thousand hills," as rwanda is known, has been partially deforested. tuyishime is also traveling around the country to see what can be done about it and improve people's lives. one of his success stories has come to the village of mandela outside the rwandan capital kigali. many of the residents are women who narrowly escaped ethnic genocide 20 years ago. the war left a village full of widows and orphans. tuyishime introduced them to the "wonder bag." it's an insulated cooking bag that means the women can cook in the morning and put the pots in the bag. it conserves heat so the food continues to simmer. when mukamana zura returns home from the field at midday, lunch is ready. it saves both work and resources. >> it