Key concepts of Climate Literacy Essential Principle 6:
a. The overwhelming consensus of scientific studies on climate indicates that most of the observed increase in global average temperatures since the latter part of the 20th century is very likely due to human activities, primarily from increases in greenhouse gas concentrations resulting from the burning of fossil fuels.
b. Emissions from the widespread burning of fossil fuels since the start of the Industrial Revolution have increased the concentration of greenhouse gases in the atmosphere.
c. Human activities have affected the land, oceans, and atmosphere, and these changes have altered global climate patterns.
d. Growing evidence shows that changes in many physical and biological systems are linked to human-caused global warming.
e. Scientists and economists predict that there will be both positive and negative impacts from global climate change.