andd like professor legesse's sstream, raiain that fell weeks ago nonow slowly seeps throuough the subsoil, replenishing the supply of water. >> [speaking in foreign language] the eroded land has become fertile,, it's changed f for the better. in the drdrought, our fruit trees dried up. now they are coming back, and we're growing even more varieties. these are thehe real benefits we've seen. we have food security, and our childldren can go to school. ouour lives have improved. >> these villagers are now better able to withstand the impact of climate change. with international assistance, their achievemenent could be repeated across the country. he benefits, as prprofessor legesse points o, would spread far beyond ethiopia's borders. >> the most important issue r africa, a and i consider this afafrica's 21st burnrning issue, is restoration. no matter whwhat we do, we might be gooood at rocket, uh, rocket uh, rocket sciencnce, i mean, , nuclear science. but the envnvironment, rerestorg this huge vastst landscape,, you know, degraded landscacape is critical for africa, particularly y for ethi