Relative to the period 18601900, global temperatures on both land and sea have increased by 1.4 °F, according to the instrumental temperature record; the urban heat island is not believed to be significant. Since 1979, land temperatures have increased about twice as fast as ocean temperatures. Temperatures in the lowest portion of the earth 's atmosphere (troposphere) have increased between 0.22 and 0.4 °F per decade since 1979, according to satellite temperature measurements. Over the one or two thousand years before 1850, temperature is believed to have been relatively stable, with possibly regional fluctuations such as the Medieval Warm Period or the Little Ice Age. Based on estimates by NASA 's Goddard Institute for Space Studies, 2005 was the warmest year since reliable, widespread instrumental measurements became available in the late 1800s, exceeding the previous record set in 1998 by a few hundredths of a degree. Estimates prepared by the World Meteorological Organization and the UK Climatic Research Unit concluded that 2005 was the second warmest year, behind 1998 (Wilkipedia, 2006).
Species are disappearing and glaciers all around the world are melting. Animal and plant species have begun dying off or changing sooner than predicted because of global warming, a review of hundreds of research studies contends. These fast-moving
References: 1. Flores, Graciela (2007); Out to Dry; Natural History, Vol. 116 Issue 1, p13-13, 1/3p, 1c 2. Climate Experts on Global Warming; Human Events; 8/04/2003, Vol. 59 Issue 26, p21, 1/2p 3. Global Warming (2006). Retrieved February 11, 2007, from http://en.wikipedia.org/wiki/ 4. Gore, Albert (2006). An Inconvenient Truth. Documentary, released on May 24, 2006. 5. Myth of Global Warming (2001). Retrieved February 25, 2007 http://www.ourcivilisation.com