Dear EarthTalk: If "cap and trade" has worked so well in Europe for reducing greenhouse gas emissions there, why haven't we tried something similar here in the U.S.?--Sandra M., Bern, NC
"Cap-and-trade," whereby big polluters must pay to emit greenhouse gases against a capped total amount that is reduced over time--has been in effect across the European Union (EU) since 2005. This so-called Emissions Trading System (ETS) requires 11,000 of the largest electric and industrial facilities in 28 European countries to participate. Some 45 percent of Europe's total greenhouse gas emissions are regulated under the system. Proponents say the ETS has succeeded in keeping greenhouse gas emissions in check and making Europe a global leader on climate. The EU reports that, by 2020, emissions from sectors covered by ETS will be 21 percent lower than they were in 2005 and 43 percent lower by 2030.
But critics argue that Europe's reduced emissions may be more due to the global recession than the ETS, and that the cheap availability of allowances has made it easier for companies to pay to burn coal than to switch to cleaner natural gas or invest more in carbon mitigation technologies. Early in 2014 the EU tightened up its system by cutting the number of new allowances it plans to issue over the next three years by a third while simultaneously creating a "market reserve" to absorb extra allowances as needed.
Meanwhile, Switzerland, New Zealand, Australia, Kazakhstan and South Korea have each set up their own national cap-and-trade programs to varying degrees of success, while regional versions have popped up within Japan, Canada and the U.S.
As to the U.S., whether or not to establish a nationwide cap-and-trade system here has been a hot topic of discussion in Congress. It last came up for a vote in 2010, but never found enough bi-partisan support to become the law of the land. But in lieu of any federal system, two U.S. regions have undertaken their own attempts at ratcheting down greenhouse gas emissions through market mechanisms:
In 2009, 10 Northeastern states came together to create...