- Carbon Dioxide (CO2) and Methane (CH4) are the main greenhouse
gases (GHG) contributing to global warming
- Over the last century the earth has warmed approximately 1
degree Fahrenheit
- The multinational Arctic Climate Impact Assessment (ACIA)
report concludes that in Alaska, western Canada, and eastern
Russia, average temperatures have increased as much as 4 to 7
degrees Fahrenheit (3 to 4 degrees Celsius) in the past 50 years.
- The concentration of carbon dioxide in the atmosphere has
risen from 290 (ppm - parts per million) in 1900 to nearly 400 ppm.
- Industry, Electric Power Generation, Agriculture and
Transportation are the four top sources of greenhouse gases (see
graph below)
The past decade was the
warmest ever on record, according to NASA data.
NASA maintains a database of
climate indicators.
United States
Global Change Research Program.
View climate change data from the
United Nations Human Development Reports.
View climate change data from the
U.S. Energy Information Administration. Past
climate change data and charts from the
Environmental Protection Agency. |
