Climate Change Facts, Data and Examples
- Emissions in the United States can be divided between three sectors (Source: Emissions of Greenhouse Gases in the United States):
- Residential, commercial and industry:
- Current atmospheric carbon dioxide concentrations are about 385 ppm — parts per million — which is 30% higher than the second-highest level for at least 800,000 years. (Source: Global Climate Change Impacts in the United States, U.S. Global Change Research Program, page 13)
- Average US temperatures have risen more than 2 degrees Fahrenheit over the past 50 years, and are expected to rise even further in the coming decades. The amount of temperature increase depends, in part, on the ongoing rate of greenhouse gas emissions. (Source: Global Climate Change Impacts in the United States, U.S. Global Change Research Program, page 27)
- The 10 warmest years since record-keeping began in 1880 have all occurred since 1997. (Source: State of the Climate: Global Analysis for Annual 2009, NOAA National Climatic Data Center)
- If carbon dioxide emissions continue to rise, global average temperatures are expected to increase another 2-11 degrees Fahrenheit by 2100. This means that, by 2100, Massachusetts could have a climate that is equivalent to current-day North Carolina. (Source: Global Climate Change Impacts in the United States, U.S. Global Change Research Program, page 24).
"Thousands of tired, nerve-shaken, over-civilized people are beginning to find out that going to the mountain is going home: that wildness is necessity; that mountain parks and reservations are useful not only as fountains of timber and irrigating rivers, but as fountains of life."