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
तसेच, दोन संस्कृती समजू शकणारी मुले, इतर लोकांच्या संपर्कात येतात तेव्हा ते त्यांचे दृष्टिकोन अधिक चांगल्याप्रकारे समजू शकतात.