CORVALLIS, Ore. – A global coalition of scientists led by William J. Ripple and Christopher Wolf of Oregon State University says “untold human suffering” is unavoidable without deep and lasting shifts in human activities that contribute to greenhouse gas emissions and other factors related to climate change.

“Despite 40 years of major global negotiations, we have continued to conduct business as usual and have failed to address this crisis,” said Ripple, distinguished professor of ecology in the OSU College of Forestry. “Climate change has arrived and is accelerating faster than many scientists expected.”

In a paper published today in BioScience, the authors, along with more than 11,000 scientist signatories from 153 countries, declare a climate emergency, present graphics showing trends as vital signs against which…