July 4, 2017 7.01pm EDT •Updated July 7, 2017 3.35pm EDT
Professor of Climate and Space Sciences and Engineering, University of Michigan
Earth’s climate is changing rapidly. We know this from billions of observations, documented in thousands of journal papers and texts and summarized every few years by the United Nations’ Intergovernmental Panel on Climate Change. The primary cause of that change is the release of carbon dioxide from burning coal, oil and natural gas.
One of the goals of the international Paris Agreement on climate changeis to limit the increase of the global surface average air temperature to 2 degrees Celsius, compared to preindustrial times. There is a further commitment to strive to limit the increase to 1.5℃.
Earth has already, essentially, reached the 1℃ threshold. Despite the avoidance of millions of tons…
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Exposing the Big Game 
I suppose nature will take its own course, in its own time, and reversion to normality will take even longer than it took us to get the planet into this mess.