OPINION: When it comes to climate change, France leads by example. It is the least carbon-intensive major economy in the world. No developed nation emits less carbon per dollar of goods and services produced. But what might surprise many, around the world and here at home, is that the world’s second-least-carbon-intensive economy is here in the United States. Worldwide, when it comes to carbon intensity—to producing more while polluting less—California is second only to France.