April 17 2017 Dana SkepticalScience.com full article here
A new study published in Nature Communications looks at changes in solar activity and carbon dioxide levels over the past 420 million years. The authors found that on our current path, by mid-century humans will be causing the fastest climate change in approximately 50 million years, and if we burn all available fossil fuels, we’ll cause the fastest change in the entire 420 million year record.….
Gavin L. Foster, et al. Future climate forcing potentially without precedent in the last 420 million years Nature Communications 8, Article number: 14845 (2017) doi:10.1038/ncomms1484