a system one of the biggest in africa what's more building materials have been looked at the source as much as possible. even when she's making her tea at the site of the. rediscovering the benefits water cost thirty percent less than it used to that's quite a savings when amy has been living in garden city in the north of the king of capital nairobi since late last year it's an expensive area of town here a new development is designed to protect the environment and save its residents money this solar energy comes from the roof of a neighboring might historic up one that we have a nice bright heat it's all the water in the apartment and when we have an opposite the heater element kicks in and we get hot water that way but when generally we're