changing conditions

Current Climate Change

Global Warming and Rising CO2

Global average surface temperatures have increased markedly over the last century (Figure 1). Humans have been measuring temperature directly since the mid- 1800’s; these measurements show that temperature increased by 1.53°F (0.85°C ) between 1880 and 2012, and that the rate of warming is increasing (IPCC 2013 Ch. 2). With the exception of 1998, the 10 warmest years in the 134-year record all have occurred since 2000, with 2010 and 2005 ranking as the warmest years on record (NASA GIS 2014).

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