The Download: urgent climate change questions, and DALL-E's big launch

Blistering heat waves have smashed temperature records around the globe this summer, scorching crops, knocking out power, fueling wildfires, buckling roads and runways, and killing hundreds in Europe alone. The sudden shift from an abstract threat to reality has many people wondering: is climate change unfolding faster than scientists had expected? Are these extreme events more extreme than studies had predicted they would be, given the levels of greenhouse gases now in the atmosphere? As it happens, those are two distinct questions, with different and nuanced answers. Our senior climate change editor James Temple explains the issues point-by-point in this explainer.