This Publication Issue does not exist in your language, View in: English (en),
Or use Google Translate:  
Papia Portugues (mcm) | Change Language (Change Language)

Students will demonstrate their understanding of ways to improve and conserve soil as they email an ECHO intern in Africa, respond to a quote from the 19th century warning of civilizations’ impact on soil, and investigate the “Dust Bowl” soil disaster in U.S. history.