Sorry, this entry is only available in French. For the sake of viewer convenience, the content is shown below in the alternative language. You...

Sorry, this entry is only available in French. For the sake of viewer convenience, the content is shown below in the alternative language. You...

Sorry, this entry is only available in French. For the sake of viewer convenience, the content is shown below in the alternative language. You...

Israeli engineers are trying to replace traditional, dirty indoor ovens used in rural Ethiopia with biofuel-powered indoor stoves that emit much less pollution. (Courtesy...

Sorry, this entry is only available in French. For the sake of viewer convenience, the content is shown below in the alternative language. You...

Sorry, this entry is only available in French. For the sake of viewer convenience, the content is shown below in the alternative language. You...

Sorry, this entry is only available in French. For the sake of viewer convenience, the content is shown below in the alternative language. You...

Sorry, this entry is only available in French. For the sake of viewer convenience, the content is shown below in the alternative language. You...