To all, concern: a climate-change special

As the Global Climate Strike gets under way, we look at all matters climatic. History shows that fervent debate—and self-interested misinformation—go back to the mid-20th century. Uncertainties in scientists’ climate models are swamped by uncertainties about what people will do. And, plenty of people are already adapting to climate change, but that presents its own risks. Finally, climate-minded artists add their voices to the debates.