So what is the G.O.P. jobs plan? The answer, in large part, is to allow more pollution. So what you need to know is that weakening environmental regulations would do little to create jobs and would make us both poorer and sicker.

Now it would be wrong to say that all Republicans see increased pollution as the answer to unemployment. Herman Cain says that the unemployed are responsible for their own plight — a claim that, at Tuesday’s presidential debate, was met with wild applause.

Both Rick Perry and Mitt Romney have, however, put weakened environmental protection at the core of their economic proposals, as have Senate Republicans. Mr. Perry has put out a specific number — 1.2 million jobs — that appears to be based on a study released by the American Petroleum Institute, a trade association, claiming favorable employment effects from removing restrictions on oil and gas extraction. The same study lies behind the claims of Senate Republicans.