Dr. Richard Alley, an Evan Pugh University Professor in the Department of Geosciences and leader of the Penn State Ice and Climate Research Center, will present a talk on Tuesday, January 14 at 7 pm at Foxdale. The well-documented risk of climate change is the potential of crossing thresholds called tipping points, which could trigger rapid, irreversible changes. Dr. Alley will describe potential tipping points and discuss the benefits of transitioning to a sustainable energy system in avoiding these thresholds. This lecture is open to the public.