1. http://news.bbc.co.uk/1/hi/sci/tech/4745963.stm .
2. http://earth.google.com .
3. Agenda for the 21st Century. Adopted by the UNO Conference on the Environment and Development. Rio de Janeiro, July 3–14, 1992, http://www.un.org/russian/sonferen/wssd/agenda21/ .
4. Convention on Biological Diversity. Adopted by the UNO Conference on the Environment and Development. Rio de Janeiro, July 3–14, 1992, http://www.un.org/russian/dosumen/sonvents/biodiv.htm .
5. Global Environment Outlook 3. Past, Present and Future Perspectives. UNEP, 2002, http://www.unep.org/geo/geo3/russian/pdf.htm;