There have been five mass extinctions in the history of the Earth. But in the 21st century, scientists now estimate that society must urgently come to grips this coming decade to stop the very first human-made biodiversity catastrophe. “The sixth extinction is on our societyʻs shoulders; it really is,” said ecologist Greg Asner, who serves on the faculty of the School of Geographical Sciences and Urban Planning and the School of Earth and Space Exploration and came to Arizona State University this past January to lead the new Center for Global Discovery and Conservation Science. “We have to make a decision about where to save biodiversity, and where to let it go,” said Asner. “That’s where we are now. We are playing that game as a society. Unfortunately, it’s gotten to that point because we are dominating the planet.” Asner is one of 19 international authors with a bold new science policy proposal to reverse the tide, called A Global Deal for Nature (GDN). The policy's mission is simple: Save the diversity and abundance of life on Earth — for the price tag of $100 billion a year. “It’s not a huge price tag,” said Asner. “That’s not a pie-in-the-sky number, but one we had to meet on and agree on. I know that those numbers are not outlandish.” Read the full story on ASU Now.