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Volume XIV, Number 1 | winter 2021


According to the iron hypothesis, sprinkling iron into low-chlorophyll regions of the ocean would create large algal blooms. Oceanographer John Martin argued that large-scale iron enrichment could grow enough algae in the oceans to absorb carbon from the atmosphere and reverse the greenhouse effect. “Give me half a tanker of iron,” he famously said in 1988, “and I will give you an ice age.”

What can you conceive more silly and extravagant than to suppose a man racking his brains and studying night and day how to fly?

—William Law, 1728

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