Population research
Greenhouse effect, Climatic changes Economic aspects., Dewey: 363.73874, Climatic changes Government policy., Climatic changes Environmental aspects., Atmospheric Government policy., Environmental policy International cooperation., Global warming Government policy., United Nations Framework Convention on Climate Change (Organization)
CO2, CO 2, global warming, climate change, greenhouse effect, greenhouse effect gases, emisiones de gases de efecto invernadero, carbon dioxide
History, Social conditions, Slave trade, Slavery, Slavery and Islam, Freedmen
Archaeology, Editors, Cultural heritage