Age-old problem: reforming France

President Emmanuel Macron embarks on a serious policy challenge today over pensions. Will his efforts at reform re-ignite the protests that have dogged his presidency? And, a look at the legacies of two opposing figures of environmentalism: David Koch, a billionaire industrialist who undermined the science of climate change, and Steve Sawyer, an activist who elevated Greenpeace to a formidable global movement.

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