ဤအရာ Publication Issue သင်၏ဘာသာစကားတွင်မရှိပါ။, တွင်..ကြည့်ပါ။: English (en),
သို့မဟုတ် ဂူဂယ်ဘာသာပြန်ကိုအသုံးပြုပါ။:  

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.