National Public Radio: Nowadays, when there's a killer heat wave or serious drought somewhere, people wonder: Is this climate change at work? It's a question scientists have struggled with for years. And now there's a new field of research that's providing some answers. It's called "attribution science" - a set of principles that allow scientists to determine when it's a change in climate that's altering weather events ... and when it isn't.
The principles start with the premise that, as almost all climate scientists...