CURRENTS December 2018 | Page 8

8 Currents December 2018 > continued from page 7 be required to design more fuel-efficient cars. Their reason: climate impacts from forfeited improvements in fuel economy "would be small, would occur on a global scale, and would not disproportionately affect the United States." Given the vast amount of greenhouse gases that are emitted around the world, you would not expect any single climate policy, even major ones, to regis- ter on the global scale, McCabe says. "Comparing the impact of any individual policy to global climate impacts is just not an appropriate thing to do. The fact that an individual action can be measured to show any impact on a global metric - that in itself is continued on page 9 >