How we know the Earth is warming and humans are responsible

By Dana Nuccitelli, May 4, 2020

Air temperature in 2018 at a height of two meters, compared to 1981–2010 average. Data from the Copernicus Climate Change Service shows that 2018 was the fourth in a series of exceptionally warm years, with atmospheric CO2 concentrations continuing to rise. Source: Copernicus Climate Change Service, ECMWF

Only two-thirds of Americans are confident in the knowledge that global warming is happening, and a bare majority understand that it’s mostly caused by human activities. One-third of Americans continue to believe that global warming is mostly natural. In reality, the scientific evidence demonstrating that global warming is happening and human-caused is overwhelming, which is why there is a 90 to 100 percent expert consensus on human-caused global warming.This raises an oft-heard question, which can be loosely phrased as: How do the experts know that global warming is happening, and that humans are the cause? Herein is a summary of the evidence underlying what has been described as a “knowledge-based consensus.” Read this premium article here.

As the coronavirus crisis shows, we need science now more than ever.

The Bulletin elevates expert voices above the noise. But as an independent, nonprofit media organization, our operations depend on the support of readers like you. Help us continue to deliver quality journalism that holds leaders accountable. Your support of our work at any level is important. In return, we promise our coverage will be understandable, influential, vigilant, solution-oriented, and fair-minded. Together we can make a difference.

Share: 

Leave a Reply

avatar
  Subscribe  
Notify of

ALSO IN THIS ISSUE

RELATED POSTS

Receive Email
Updates