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In 1938, a British engineer and amateur meteorologist made a discovery that set off a fierce debate about climate change. Scientists had known for decades that carbon dioxide could trap heat and warm the planet. But Guy Callendar was the first to connect human activities to global warming. He showed that land temperatures had increased More
The post The Callendar Effect: How a Mild-Mannered Biker Triggered a Huge Debate Over Humans’ Role in Climate Change…in the Early 20th Century appeared first on CounterPunch.org.
This content originally appeared on CounterPunch.org and was authored by Sylvia G. Dee.