The US, Other Countries Struggle to Implement a Carbon Tax after COP21

Having agreed to ambitious new targets for reducing emissions of greenhouse gases in Paris, the world’s nations now need a way to hit those targets.

There’s no dispute among economists on the most cost-effective way to do that: a carbon tax. President Barack Obama agrees. In Paris he called such a tax “the most elegant way” to incentivize investment in, and consumer demand for, cleaner energy technology.

Bill Ingals