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It's Still Later than You Think


THIS WEEKS SHOW:

Summary: Ozone threat not solved, scientists say. From Zurich, lead author Dr. William Ball says Earth’s ozone shield against harmful radiation continues to weaken – despite an improvement of big ozone holes over the Poles. It’s possible our smog is the last protection. But wait. Another study from University of California Berkeley says a weakened ozone shield 251 million years ago drove the mass extinction of forests, and all life that depended on them. Lead author Jeffrey Benca: we underestimate the risk of harm from thinning ozone,& misunderstand the hidden process of mass extinction.
Credits: Interviews by Alex Smith

Snatch of music from Dana Pearson



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