If you're talking about how to provide energy to the people of Rwanda, that smell might be methane. Which Rwanda has a lot of, at the bottom of Lake Kivu, according to this BBC News article:
... the lake is holding enough unexploited energy to meet Rwanda's needs for 200 years. Rotting vegetation which has been deposited for millions of years at the bottom of the lake is giving off a constant regenerating supply of methane gas.
So despite the many challenges the Republic of Rwanda faces - climate change, malnutrition, poverty, genocide - their energy problems may be easier to tackle.