From The Wall Street Journal
It is a basic tenet of economics that regulations almost always have unintended consequences. While Adam Smith may have been one of the first to understand this, he could not have possibly foreseen the morass of expensive and unwanted consequences that could come from conflicting emission and fuel standards enacted by the state of California and federal programs, such as for greenhouse gases and Corporate Average Fuel Economy.
Both the state and federal regulations have worthy goals: to decrease greenhouse-gas emissions and lower petroleum consumption. Yet taken together, the federal standards effectively cancel out the California standard. Instead of promoting fuel reduction as intended, the California standard allows for the production of less-efficient vehicles, while facilitating a massive transfer of cash via credit trading. It also forms a de facto industrial policy that sends us down a path toward electric vehicles that may or may not be the best technological or environmental choice for the future.