Nevada CO2 Emissions Analysis

Global annually averaged surface air temperature has increased by about 1.8°F (1.0°C) over the last 115 years (1901-2016). This period is now the warmest in the history of modern civilization. • It is extremely likely that human activities, especially emissions of GHG, are the dominant cause of the observed warming since the mid-20th century. For the warming over the last century, there is no convincing alternative explanation supported by the extent of the observational evidence. The global atmospheric CO2 concentration has now passed 400 parts per million, a level that last occurred about 3 million years ago, when both global average temperature and sea level were significantly higher than today. 5

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