Editor's note: Matt Ridley's Sept. 4 op-ed, "Whatever Happened to Global Warming?," stirred a strong response, not least among the enforcers of climate-change orthodoxy. Here is Mr. Ridley's reply to his critics, adapted from his blog:

Post-script. After the article was published, an astonishing tweet was sent by the prominent economist Jeffrey Sachs saying:

"Ridley climate ignorance in WSJ today is part of compulsive lying of Murdoch media gang. Ridley totally misrepresents the science."

Curious to know how I had lied or "totally misrepresented" the science, I asked Sachs to explain. There was a deafening silence.

There then appeared at the Huffington Post an article under Sachs's name. Its style was quite unlike that of Sachs. The piece purported to—in a spin doctor's words—expose: