Signs of climate change, global and U.S.
"Global sea level rose about 17 centimeters (6.7 inches) in the last century. The rate in the last decade, however, is nearly double that of the last century"
"All three major global surface temperature reconstructions show that Earth has warmed since 1880. Most of this warming has occurred since the 1970s, with the 20 warmest years having occurred since 1981 and with all 10 of the warmest years occurring in the past 12 years"
source:
NASA, Global Climate Change, http://climate.nasa.gov/evidence/
"The current CO2 level is higher than it has been in at least 800,000 years."
source:
EPA, Causes of Climate Change, http://www.epa.gov/climatechange/science/causes.html
"Carbon dioxide (CO2) emissions in the United States increased by about 7% between 1990 and 2010... Going forward, CO2 emissions in the United States are projected to grow by about 1.5% between 2005 and 2020."
source:
EPA, Greenhouse Gas Emissions, http://www.epa.gov/climatechange/ghgemissions/gases/co2.html#Trends
"Arctic Ocean where multi-year ice covers at least 15 percent of the ocean surface – is diminishing at a rate of -15.1 percent per decade, the study found."
source:NASA, NASA Finds Thickest Parts of Arctic Ice Cap Melting Faster, http://www.nasa.gov/topics/earth/features/thick-melt.html
Graph showing CO2 emissions since 1949: http://www.c2es.org/facts-figures/us-emissions/co2
Sources embedded in text
[verified 4/17/14]