Sunday, October 31, 2010
Moody's Sovereign Ratings [163-3]
Moody's Investor Service as well as Standard and Poor rate not only corporations but sovereigns, i.e. countries, as well. Most institutional investment firms have rules prohibiting them from buying government bonds issued by countries with a low, speculation-grade rating. Only blue-chip (Aaa=light color) and high to medium grade countries (Aa-Baa3=dark) are considered investment grades, all other countries (Ba1 to C) therefore did not even show up on these investors' radar screens in 2005.
Monday, October 25, 2010
Forest Fires [159]
In spring 1998 uncontrolled forest fires raged in the equatorial regions. Airplanes crashed in Indonesia, Smoke plumes reached across national borders into other countries and even continents. One day the loss of forest the size of Belgium in Brazil was reported. El Nino was generally blamed for the lack of rain.
Saturday, October 16, 2010
AIDS Impact on Regions 1997 [152]
Saturday, October 9, 2010
Earthquakes and Tectonic Plates [121]
There are eight major and many minor tectonic plates. These plates move in relation to one another at one of three types of plate boundaries: convergent, or collisional boundaries; divergent boundaries, also called spreading centers; and transform boundaries. Earthquakes, volcanic activity, mountain-building, and oceanic trench formation occur along plate boundaries. The lateral movement of the plates is typically at speeds of 50–100 mm annually.
Saturday, October 2, 2010
Nuclear Non-Proliferation [178]
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