15 Irrefutable Signs That Climate Change Is Real


Polar Bear Ice

From rising air and ocean temperatures to shrinking glaciers and widespread melting of snow and ice, evidence of a changing global climate is all around us. 

The Intergovernmental Panel on Climate Change has linked many of these changes in climate to an increase greenhouse gas emissions from human activities, which was documented in a 2007 assessment report compiled by thousands of scientists over decades of research and debate.

Regardless of their causes – whether you believe in anthropogenic drivers, like fossil fuels from power plants and cars or not — the observed changes in climate are scientific facts that have grave implications for the future of natural and human systems.

Global temperature trends estimated by four different research groups all show a warming of the Earth over the past century, with particularly rapid increases over the past few decades.

Source: EDF

Since 1901, global average surface temperatures have risen at an average rate of 0.13ºF per decade. The United States has warmed at nearly twice the global rate since the 1970s.

Source: EPA

The years between 1995 and 2006 rank among the 12 warmest years in the instrumental record of global surface temperature (since 1850).

Source: IPCC 2007

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