Environmentalists are concerned that parts of Africa could suffer a phenomenon similar to the 1930 ’ s dust bowl, which resulted from overplowing and drought and destroyed prairie lands in the United States.
“ दोन भाषा बोलणारी मुले, एक भाषा बोलणाऱ्‍या मुलांपेक्षा शाळेत उत्तम प्रगती करतात, ” असे अभ्यासांवरून दिसून आले आहे.