the benefits, as professor legesse points out, would spread far beyond ethiopia's borders. >> the most important issue for africa, and i consider this africa's 21st burning issue, is restoration. no matter what we do, we might be good at rocket, uh, rocket uh, rocket science, i mean, nuclear science. but the environment, restoring this huge vast landscape, you know, degraded landscape is critical for africa, particularly for ethiopia. you know, half of ethiopia is mountains, and this mountain system is degraded, and this degradation of this huge landscape, huge mountain chain of ethiopia is critical not only for ethiopia, but also for the entire region. consider egypt, look at the sudan, where six percent of the nile flows to these countries. how can you support life in egypt without restoring ethiopia's mountains? so this is regional, national, and international. >> environmental degradation is not only a problem for the dry regions of ethiopia. it can be just as devastating for counries likrwanda, where rainfall is plentiful. this tiny country is grappling with the problem of a growi