Climate Science: 50 Years Later

What have we learned about climate science in the 50 years since PCAST's first warning on the effects of accumulating carbon dioxide in the atmosphere?

Five decades after the first climate change warning to an American president, the signs are apparent. Global temperatures have increased, extreme weather events are more common, and species are fleeing their habitats.

Climate Science, 50 Years Later, the 29 October symposium at the Carnegie Institute of Science in Washington, D.C., assembled more than a dozen prominent scientists who recounted the damages caused by climate change, reflected on the past, and considered how best to respond to an increasingly challenging future.